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Finding the Fourth Proportional to 74,651.60, 112,020.60 and 27,909.20

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Solution

The fourth proportional to 74,651.60, 112,020.60 and 27,909.20 is: 41,879.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,651.60 : 112,020.60 = 27,909.20 : x
  2. Step 2: Convert to fraction form
    74,651.60/112,020.60 = 27,909.20/x
  3. Step 3: Cross multiply
    74,651.60x = 112,020.60 × 27,909.20
  4. Step 4: Simplify right side
    74,651.60x = 3,126,405,329.52
  5. Step 5: Solve for x
    x = 3,126,405,329.52/74,651.60
  6. Step 6: Final answer
    x = 41,879.95

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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.