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Finding the Fourth Proportional to 78,909.10, 108,890.45 and 43,092.11

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Solution

The fourth proportional to 78,909.10, 108,890.45 and 43,092.11 is: 59,464.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.10 : 108,890.45 = 43,092.11 : x
  2. Step 2: Convert to fraction form
    78,909.10/108,890.45 = 43,092.11/x
  3. Step 3: Cross multiply
    78,909.10x = 108,890.45 × 43,092.11
  4. Step 4: Simplify right side
    78,909.10x = 4,692,319,249.35
  5. Step 5: Solve for x
    x = 4,692,319,249.35/78,909.10
  6. Step 6: Final answer
    x = 59,464.87

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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.