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Finding the Fourth Proportional to 91,675.80, 137,520.90 and 39,085.68

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Solution

The fourth proportional to 91,675.80, 137,520.90 and 39,085.68 is: 58,631.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,675.80 : 137,520.90 = 39,085.68 : x
  2. Step 2: Convert to fraction form
    91,675.80/137,520.90 = 39,085.68/x
  3. Step 3: Cross multiply
    91,675.80x = 137,520.90 × 39,085.68
  4. Step 4: Simplify right side
    91,675.80x = 5,375,097,890.71
  5. Step 5: Solve for x
    x = 5,375,097,890.71/91,675.80
  6. Step 6: Final answer
    x = 58,631.59

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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.