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Finding the Fourth Proportional to 138,909.03, 207,770.15 and 115,973.48

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Solution

The fourth proportional to 138,909.03, 207,770.15 and 115,973.48 is: 173,464.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,909.03 : 207,770.15 = 115,973.48 : x
  2. Step 2: Convert to fraction form
    138,909.03/207,770.15 = 115,973.48/x
  3. Step 3: Cross multiply
    138,909.03x = 207,770.15 × 115,973.48
  4. Step 4: Simplify right side
    138,909.03x = 24,095,826,586.70
  5. Step 5: Solve for x
    x = 24,095,826,586.70/138,909.03
  6. Step 6: Final answer
    x = 173,464.80

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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.