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Finding the Fourth Proportional to 120,090.01, 165,732.81 and 66,373.87

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Solution

The fourth proportional to 120,090.01, 165,732.81 and 66,373.87 is: 91,600.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,090.01 : 165,732.81 = 66,373.87 : x
  2. Step 2: Convert to fraction form
    120,090.01/165,732.81 = 66,373.87/x
  3. Step 3: Cross multiply
    120,090.01x = 165,732.81 × 66,373.87
  4. Step 4: Simplify right side
    120,090.01x = 11,000,327,985.67
  5. Step 5: Solve for x
    x = 11,000,327,985.67/120,090.01
  6. Step 6: Final answer
    x = 91,600.69

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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.