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Finding the Fourth Proportional to 81,658.59, 122,508.72 and 39,558.84

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Solution

The fourth proportional to 81,658.59, 122,508.72 and 39,558.84 is: 59,348.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,658.59 : 122,508.72 = 39,558.84 : x
  2. Step 2: Convert to fraction form
    81,658.59/122,508.72 = 39,558.84/x
  3. Step 3: Cross multiply
    81,658.59x = 122,508.72 × 39,558.84
  4. Step 4: Simplify right side
    81,658.59x = 4,846,302,853.08
  5. Step 5: Solve for x
    x = 4,846,302,853.08/81,658.59
  6. Step 6: Final answer
    x = 59,348.35

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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.