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Finding the Fourth Proportional to 129,320.82, 178,404.12 and 93,454.02

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Solution

The fourth proportional to 129,320.82, 178,404.12 and 93,454.02 is: 128,924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,320.82 : 178,404.12 = 93,454.02 : x
  2. Step 2: Convert to fraction form
    129,320.82/178,404.12 = 93,454.02/x
  3. Step 3: Cross multiply
    129,320.82x = 178,404.12 × 93,454.02
  4. Step 4: Simplify right side
    129,320.82x = 16,672,582,198.56
  5. Step 5: Solve for x
    x = 16,672,582,198.56/129,320.82
  6. Step 6: Final answer
    x = 128,924.19

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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.