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Finding the Fourth Proportional to 99,693.68, 137,542.84 and 63,903.40

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Solution

The fourth proportional to 99,693.68, 137,542.84 and 63,903.40 is: 88,164.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,693.68 : 137,542.84 = 63,903.40 : x
  2. Step 2: Convert to fraction form
    99,693.68/137,542.84 = 63,903.40/x
  3. Step 3: Cross multiply
    99,693.68x = 137,542.84 × 63,903.40
  4. Step 4: Simplify right side
    99,693.68x = 8,789,455,121.66
  5. Step 5: Solve for x
    x = 8,789,455,121.66/99,693.68
  6. Step 6: Final answer
    x = 88,164.62

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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.