Home / 129,169.76-178,253.46-72,581.13

Finding the Fourth Proportional to 129,169.76, 178,253.46 and 72,581.13

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Solution

The fourth proportional to 129,169.76, 178,253.46 and 72,581.13 is: 100,161.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,169.76 : 178,253.46 = 72,581.13 : x
  2. Step 2: Convert to fraction form
    129,169.76/178,253.46 = 72,581.13/x
  3. Step 3: Cross multiply
    129,169.76x = 178,253.46 × 72,581.13
  4. Step 4: Simplify right side
    129,169.76x = 12,937,837,553.21
  5. Step 5: Solve for x
    x = 12,937,837,553.21/129,169.76
  6. Step 6: Final answer
    x = 100,161.51

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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.