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Finding the Fourth Proportional to 215,314.80, 322,972.20 and 65,553.90

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Solution

The fourth proportional to 215,314.80, 322,972.20 and 65,553.90 is: 98,330.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,314.80 : 322,972.20 = 65,553.90 : x
  2. Step 2: Convert to fraction form
    215,314.80/322,972.20 = 65,553.90/x
  3. Step 3: Cross multiply
    215,314.80x = 322,972.20 × 65,553.90
  4. Step 4: Simplify right side
    215,314.80x = 21,172,087,301.58
  5. Step 5: Solve for x
    x = 21,172,087,301.58/215,314.80
  6. Step 6: Final answer
    x = 98,330.85

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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.