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Finding the Fourth Proportional to 65,640.46, 98,470.35 and 21,252.46

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Solution

The fourth proportional to 65,640.46, 98,470.35 and 21,252.46 is: 31,881.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,640.46 : 98,470.35 = 21,252.46 : x
  2. Step 2: Convert to fraction form
    65,640.46/98,470.35 = 21,252.46/x
  3. Step 3: Cross multiply
    65,640.46x = 98,470.35 × 21,252.46
  4. Step 4: Simplify right side
    65,640.46x = 2,092,737,174.56
  5. Step 5: Solve for x
    x = 2,092,737,174.56/65,640.46
  6. Step 6: Final answer
    x = 31,881.82

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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.