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Finding the Fourth Proportional to 120,089.01, 165,731.43 and 66,372.87

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Solution

The fourth proportional to 120,089.01, 165,731.43 and 66,372.87 is: 91,599.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,089.01 : 165,731.43 = 66,372.87 : x
  2. Step 2: Convert to fraction form
    120,089.01/165,731.43 = 66,372.87/x
  3. Step 3: Cross multiply
    120,089.01x = 165,731.43 × 66,372.87
  4. Step 4: Simplify right side
    120,089.01x = 11,000,070,658.30
  5. Step 5: Solve for x
    x = 11,000,070,658.30/120,089.01
  6. Step 6: Final answer
    x = 91,599.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.