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Finding the Fourth Proportional to 65,687.62, 98,545.27 and 21,310.91

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Solution

The fourth proportional to 65,687.62, 98,545.27 and 21,310.91 is: 31,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,687.62 : 98,545.27 = 21,310.91 : x
  2. Step 2: Convert to fraction form
    65,687.62/98,545.27 = 21,310.91/x
  3. Step 3: Cross multiply
    65,687.62x = 98,545.27 × 21,310.91
  4. Step 4: Simplify right side
    65,687.62x = 2,100,089,379.90
  5. Step 5: Solve for x
    x = 2,100,089,379.90/65,687.62
  6. Step 6: Final answer
    x = 31,970.86

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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.