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Finding the Fourth Proportional to 63,590.70, 87,755.50 and 39,731.21

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Solution

The fourth proportional to 63,590.70, 87,755.50 and 39,731.21 is: 54,829.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,590.70 : 87,755.50 = 39,731.21 : x
  2. Step 2: Convert to fraction form
    63,590.70/87,755.50 = 39,731.21/x
  3. Step 3: Cross multiply
    63,590.70x = 87,755.50 × 39,731.21
  4. Step 4: Simplify right side
    63,590.70x = 3,486,632,139.12
  5. Step 5: Solve for x
    x = 3,486,632,139.12/63,590.70
  6. Step 6: Final answer
    x = 54,829.28

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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.