Home / 129,395.16-178,546.14-72,803.16

Finding the Fourth Proportional to 129,395.16, 178,546.14 and 72,803.16

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Solution

The fourth proportional to 129,395.16, 178,546.14 and 72,803.16 is: 100,457.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.16 : 178,546.14 = 72,803.16 : x
  2. Step 2: Convert to fraction form
    129,395.16/178,546.14 = 72,803.16/x
  3. Step 3: Cross multiply
    129,395.16x = 178,546.14 × 72,803.16
  4. Step 4: Simplify right side
    129,395.16x = 12,998,723,197.80
  5. Step 5: Solve for x
    x = 12,998,723,197.80/129,395.16
  6. Step 6: Final answer
    x = 100,457.57

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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.