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Finding the Fourth Proportional to 63,655.80, 87,808.45 and 39,740.95

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Solution

The fourth proportional to 63,655.80, 87,808.45 and 39,740.95 is: 54,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,655.80 : 87,808.45 = 39,740.95 : x
  2. Step 2: Convert to fraction form
    63,655.80/87,808.45 = 39,740.95/x
  3. Step 3: Cross multiply
    63,655.80x = 87,808.45 × 39,740.95
  4. Step 4: Simplify right side
    63,655.80x = 3,489,591,022.32
  5. Step 5: Solve for x
    x = 3,489,591,022.32/63,655.80
  6. Step 6: Final answer
    x = 54,819.69

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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.