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Finding the Fourth Proportional to 129,861.90, 194,792.85 and 59,877.90

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Solution

The fourth proportional to 129,861.90, 194,792.85 and 59,877.90 is: 89,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,861.90 : 194,792.85 = 59,877.90 : x
  2. Step 2: Convert to fraction form
    129,861.90/194,792.85 = 59,877.90/x
  3. Step 3: Cross multiply
    129,861.90x = 194,792.85 × 59,877.90
  4. Step 4: Simplify right side
    129,861.90x = 11,663,786,793.02
  5. Step 5: Solve for x
    x = 11,663,786,793.02/129,861.90
  6. Step 6: Final answer
    x = 89,816.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.