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Finding the Fourth Proportional to 143,644.04, 215,393.94 and 83,691.92

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Solution

The fourth proportional to 143,644.04, 215,393.94 and 83,691.92 is: 125,495.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,644.04 : 215,393.94 = 83,691.92 : x
  2. Step 2: Convert to fraction form
    143,644.04/215,393.94 = 83,691.92/x
  3. Step 3: Cross multiply
    143,644.04x = 215,393.94 × 83,691.92
  4. Step 4: Simplify right side
    143,644.04x = 18,026,732,394.96
  5. Step 5: Solve for x
    x = 18,026,732,394.96/143,644.04
  6. Step 6: Final answer
    x = 125,495.86

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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.