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Finding the Fourth Proportional to 71,293.80, 106,932.50 and 18,707.39

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Solution

The fourth proportional to 71,293.80, 106,932.50 and 18,707.39 is: 28,058.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,293.80 : 106,932.50 = 18,707.39 : x
  2. Step 2: Convert to fraction form
    71,293.80/106,932.50 = 18,707.39/x
  3. Step 3: Cross multiply
    71,293.80x = 106,932.50 × 18,707.39
  4. Step 4: Simplify right side
    71,293.80x = 2,000,427,824.13
  5. Step 5: Solve for x
    x = 2,000,427,824.13/71,293.80
  6. Step 6: Final answer
    x = 28,058.93

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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.