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Finding the Fourth Proportional to 87,924.70, 131,638.65 and 68,430.70

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Solution

The fourth proportional to 87,924.70, 131,638.65 and 68,430.70 is: 102,452.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,924.70 : 131,638.65 = 68,430.70 : x
  2. Step 2: Convert to fraction form
    87,924.70/131,638.65 = 68,430.70/x
  3. Step 3: Cross multiply
    87,924.70x = 131,638.65 × 68,430.70
  4. Step 4: Simplify right side
    87,924.70x = 9,008,124,966.56
  5. Step 5: Solve for x
    x = 9,008,124,966.56/87,924.70
  6. Step 6: Final answer
    x = 102,452.72

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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.