Home / 129,395.13-178,542-74,200.11

Finding the Fourth Proportional to 129,395.13, 178,542 and 74,200.11

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Solution

The fourth proportional to 129,395.13, 178,542 and 74,200.11 is: 102,382.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.13 : 178,542 = 74,200.11 : x
  2. Step 2: Convert to fraction form
    129,395.13/178,542 = 74,200.11/x
  3. Step 3: Cross multiply
    129,395.13x = 178,542 × 74,200.11
  4. Step 4: Simplify right side
    129,395.13x = 13,247,836,039.62
  5. Step 5: Solve for x
    x = 13,247,836,039.62/129,395.13
  6. Step 6: Final answer
    x = 102,382.80

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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.