Home / 129,490.13-178,700.03-72,901.50

Finding the Fourth Proportional to 129,490.13, 178,700.03 and 72,901.50

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Solution

The fourth proportional to 129,490.13, 178,700.03 and 72,901.50 is: 100,606.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,490.13 : 178,700.03 = 72,901.50 : x
  2. Step 2: Convert to fraction form
    129,490.13/178,700.03 = 72,901.50/x
  3. Step 3: Cross multiply
    129,490.13x = 178,700.03 × 72,901.50
  4. Step 4: Simplify right side
    129,490.13x = 13,027,499,872.54
  5. Step 5: Solve for x
    x = 13,027,499,872.54/129,490.13
  6. Step 6: Final answer
    x = 100,606.13

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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.