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Finding the Fourth Proportional to 65,115.18, 97,687.50 and 20,744.46

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Solution

The fourth proportional to 65,115.18, 97,687.50 and 20,744.46 is: 31,121.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,115.18 : 97,687.50 = 20,744.46 : x
  2. Step 2: Convert to fraction form
    65,115.18/97,687.50 = 20,744.46/x
  3. Step 3: Cross multiply
    65,115.18x = 97,687.50 × 20,744.46
  4. Step 4: Simplify right side
    65,115.18x = 2,026,474,436.25
  5. Step 5: Solve for x
    x = 2,026,474,436.25/65,115.18
  6. Step 6: Final answer
    x = 31,121.38

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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.