Home / 129,459.28-178,629.96-72,858.64

Finding the Fourth Proportional to 129,459.28, 178,629.96 and 72,858.64

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Solution

The fourth proportional to 129,459.28, 178,629.96 and 72,858.64 is: 100,531.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,459.28 : 178,629.96 = 72,858.64 : x
  2. Step 2: Convert to fraction form
    129,459.28/178,629.96 = 72,858.64/x
  3. Step 3: Cross multiply
    129,459.28x = 178,629.96 × 72,858.64
  4. Step 4: Simplify right side
    129,459.28x = 13,014,735,948.85
  5. Step 5: Solve for x
    x = 13,014,735,948.85/129,459.28
  6. Step 6: Final answer
    x = 100,531.50

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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.