Home / 129,457.68-178,616.64-75,756

Finding the Fourth Proportional to 129,457.68, 178,616.64 and 75,756

Calculator

Solution

The fourth proportional to 129,457.68, 178,616.64 and 75,756 is: 104,522.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,457.68 : 178,616.64 = 75,756 : x
  2. Step 2: Convert to fraction form
    129,457.68/178,616.64 = 75,756/x
  3. Step 3: Cross multiply
    129,457.68x = 178,616.64 × 75,756
  4. Step 4: Simplify right side
    129,457.68x = 13,531,282,179.84
  5. Step 5: Solve for x
    x = 13,531,282,179.84/129,457.68
  6. Step 6: Final answer
    x = 104,522.82

Related Problems

Find fourth proportional to 64,728.84, 89,308.32 and 37,878
Half scale
Find fourth proportional to 258,915.36, 357,233.28 and 151,512
Double scale
Find fourth proportional to 129,458.68, 178,618.02 and 75,757
Similar ratio
Find fourth proportional to 194,186.52, 267,924.96 and 113,634
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.