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Finding the Fourth Proportional to 121,294.80, 181,942.38 and 42,408.90

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Solution

The fourth proportional to 121,294.80, 181,942.38 and 42,408.90 is: 63,613.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,294.80 : 181,942.38 = 42,408.90 : x
  2. Step 2: Convert to fraction form
    121,294.80/181,942.38 = 42,408.90/x
  3. Step 3: Cross multiply
    121,294.80x = 181,942.38 × 42,408.90
  4. Step 4: Simplify right side
    121,294.80x = 7,715,976,199.18
  5. Step 5: Solve for x
    x = 7,715,976,199.18/121,294.80
  6. Step 6: Final answer
    x = 63,613.41

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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.