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Finding the Fourth Proportional to 129,572.52, 178,809.28 and 73,002.12

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Solution

The fourth proportional to 129,572.52, 178,809.28 and 73,002.12 is: 100,742.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,572.52 : 178,809.28 = 73,002.12 : x
  2. Step 2: Convert to fraction form
    129,572.52/178,809.28 = 73,002.12/x
  3. Step 3: Cross multiply
    129,572.52x = 178,809.28 × 73,002.12
  4. Step 4: Simplify right side
    129,572.52x = 13,053,456,515.67
  5. Step 5: Solve for x
    x = 13,053,456,515.67/129,572.52
  6. Step 6: Final answer
    x = 100,742.48

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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.