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Finding the Fourth Proportional to 84,326.47, 126,530.71 and 39,900.30

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Solution

The fourth proportional to 84,326.47, 126,530.71 and 39,900.30 is: 59,869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,326.47 : 126,530.71 = 39,900.30 : x
  2. Step 2: Convert to fraction form
    84,326.47/126,530.71 = 39,900.30/x
  3. Step 3: Cross multiply
    84,326.47x = 126,530.71 × 39,900.30
  4. Step 4: Simplify right side
    84,326.47x = 5,048,612,713.97
  5. Step 5: Solve for x
    x = 5,048,612,713.97/84,326.47
  6. Step 6: Final answer
    x = 59,869.85

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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.