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Finding the Fourth Proportional to 65,691.48, 98,551.05 and 21,314.76

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Solution

The fourth proportional to 65,691.48, 98,551.05 and 21,314.76 is: 31,976.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,691.48 : 98,551.05 = 21,314.76 : x
  2. Step 2: Convert to fraction form
    65,691.48/98,551.05 = 21,314.76/x
  3. Step 3: Cross multiply
    65,691.48x = 98,551.05 × 21,314.76
  4. Step 4: Simplify right side
    65,691.48x = 2,100,591,978.50
  5. Step 5: Solve for x
    x = 2,100,591,978.50/65,691.48
  6. Step 6: Final answer
    x = 31,976.63

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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.