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Finding the Fourth Proportional to 61,687.72, 92,532.34 and 21,707.90

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Solution

The fourth proportional to 61,687.72, 92,532.34 and 21,707.90 is: 32,562.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,687.72 : 92,532.34 = 21,707.90 : x
  2. Step 2: Convert to fraction form
    61,687.72/92,532.34 = 21,707.90/x
  3. Step 3: Cross multiply
    61,687.72x = 92,532.34 × 21,707.90
  4. Step 4: Simplify right side
    61,687.72x = 2,008,682,225.85
  5. Step 5: Solve for x
    x = 2,008,682,225.85/61,687.72
  6. Step 6: Final answer
    x = 32,562.11

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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.