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Finding the Fourth Proportional to 52,766.40, 79,034.40 and 40,987.20

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Solution

The fourth proportional to 52,766.40, 79,034.40 and 40,987.20 is: 61,391.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,766.40 : 79,034.40 = 40,987.20 : x
  2. Step 2: Convert to fraction form
    52,766.40/79,034.40 = 40,987.20/x
  3. Step 3: Cross multiply
    52,766.40x = 79,034.40 × 40,987.20
  4. Step 4: Simplify right side
    52,766.40x = 3,239,398,759.68
  5. Step 5: Solve for x
    x = 3,239,398,759.68/52,766.40
  6. Step 6: Final answer
    x = 61,391.32

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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.