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Finding the Fourth Proportional to 120,817.80, 181,154.70 and 74,104.20

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Solution

The fourth proportional to 120,817.80, 181,154.70 and 74,104.20 is: 111,112.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,817.80 : 181,154.70 = 74,104.20 : x
  2. Step 2: Convert to fraction form
    120,817.80/181,154.70 = 74,104.20/x
  3. Step 3: Cross multiply
    120,817.80x = 181,154.70 × 74,104.20
  4. Step 4: Simplify right side
    120,817.80x = 13,424,324,119.74
  5. Step 5: Solve for x
    x = 13,424,324,119.74/120,817.80
  6. Step 6: Final answer
    x = 111,112.14

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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.