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Finding the Fourth Proportional to 120,997.20, 181,495.80 and 83,672.40

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Solution

The fourth proportional to 120,997.20, 181,495.80 and 83,672.40 is: 125,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,997.20 : 181,495.80 = 83,672.40 : x
  2. Step 2: Convert to fraction form
    120,997.20/181,495.80 = 83,672.40/x
  3. Step 3: Cross multiply
    120,997.20x = 181,495.80 × 83,672.40
  4. Step 4: Simplify right side
    120,997.20x = 15,186,189,175.92
  5. Step 5: Solve for x
    x = 15,186,189,175.92/120,997.20
  6. Step 6: Final answer
    x = 125,508.60

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1.5x scale

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.