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Finding the Fourth Proportional to 120,996.10, 181,530.60 and 86,004.10

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Solution

The fourth proportional to 120,996.10, 181,530.60 and 86,004.10 is: 129,032.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,996.10 : 181,530.60 = 86,004.10 : x
  2. Step 2: Convert to fraction form
    120,996.10/181,530.60 = 86,004.10/x
  3. Step 3: Cross multiply
    120,996.10x = 181,530.60 × 86,004.10
  4. Step 4: Simplify right side
    120,996.10x = 15,612,375,875.46
  5. Step 5: Solve for x
    x = 15,612,375,875.46/120,996.10
  6. Step 6: Final answer
    x = 129,032.06

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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.