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Finding the Fourth Proportional to 129,019.92, 178,059.24 and 75,330.96

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Solution

The fourth proportional to 129,019.92, 178,059.24 and 75,330.96 is: 103,963.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,019.92 : 178,059.24 = 75,330.96 : x
  2. Step 2: Convert to fraction form
    129,019.92/178,059.24 = 75,330.96/x
  3. Step 3: Cross multiply
    129,019.92x = 178,059.24 × 75,330.96
  4. Step 4: Simplify right side
    129,019.92x = 13,413,373,486.07
  5. Step 5: Solve for x
    x = 13,413,373,486.07/129,019.92
  6. Step 6: Final answer
    x = 103,963.59

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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.