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Finding the Fourth Proportional to 87,909.63, 121,315.11 and 47,624.39

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Solution

The fourth proportional to 87,909.63, 121,315.11 and 47,624.39 is: 65,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,909.63 : 121,315.11 = 47,624.39 : x
  2. Step 2: Convert to fraction form
    87,909.63/121,315.11 = 47,624.39/x
  3. Step 3: Cross multiply
    87,909.63x = 121,315.11 × 47,624.39
  4. Step 4: Simplify right side
    87,909.63x = 5,777,557,504.96
  5. Step 5: Solve for x
    x = 5,777,557,504.96/87,909.63
  6. Step 6: Final answer
    x = 65,721.55

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.