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Finding the Fourth Proportional to 84,593.25, 126,904.55 and 28,438.79

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Solution

The fourth proportional to 84,593.25, 126,904.55 and 28,438.79 is: 42,663.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,593.25 : 126,904.55 = 28,438.79 : x
  2. Step 2: Convert to fraction form
    84,593.25/126,904.55 = 28,438.79/x
  3. Step 3: Cross multiply
    84,593.25x = 126,904.55 × 28,438.79
  4. Step 4: Simplify right side
    84,593.25x = 3,609,011,070.78
  5. Step 5: Solve for x
    x = 3,609,011,070.78/84,593.25
  6. Step 6: Final answer
    x = 42,663.11

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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.