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Finding the Fourth Proportional to 79,781.80, 119,643.90 and 40,325.80

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Solution

The fourth proportional to 79,781.80, 119,643.90 and 40,325.80 is: 60,474.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,781.80 : 119,643.90 = 40,325.80 : x
  2. Step 2: Convert to fraction form
    79,781.80/119,643.90 = 40,325.80/x
  3. Step 3: Cross multiply
    79,781.80x = 119,643.90 × 40,325.80
  4. Step 4: Simplify right side
    79,781.80x = 4,824,735,982.62
  5. Step 5: Solve for x
    x = 4,824,735,982.62/79,781.80
  6. Step 6: Final answer
    x = 60,474.14

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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.