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Finding the Fourth Proportional to 147,138.80, 220,823.40 and 68,262.80

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Solution

The fourth proportional to 147,138.80, 220,823.40 and 68,262.80 is: 102,447.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,138.80 : 220,823.40 = 68,262.80 : x
  2. Step 2: Convert to fraction form
    147,138.80/220,823.40 = 68,262.80/x
  3. Step 3: Cross multiply
    147,138.80x = 220,823.40 × 68,262.80
  4. Step 4: Simplify right side
    147,138.80x = 15,074,023,589.52
  5. Step 5: Solve for x
    x = 15,074,023,589.52/147,138.80
  6. Step 6: Final answer
    x = 102,447.65

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1.5x scale

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.