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Finding the Fourth Proportional to 72,403.52, 99,930.48 and 42,193.28

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Solution

The fourth proportional to 72,403.52, 99,930.48 and 42,193.28 is: 58,234.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,403.52 : 99,930.48 = 42,193.28 : x
  2. Step 2: Convert to fraction form
    72,403.52/99,930.48 = 42,193.28/x
  3. Step 3: Cross multiply
    72,403.52x = 99,930.48 × 42,193.28
  4. Step 4: Simplify right side
    72,403.52x = 4,216,394,723.17
  5. Step 5: Solve for x
    x = 4,216,394,723.17/72,403.52
  6. Step 6: Final answer
    x = 58,234.66

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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.