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Finding the Fourth Proportional to 74,695.20, 111,944.40 and 54,880.80

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Solution

The fourth proportional to 74,695.20, 111,944.40 and 54,880.80 is: 82,248.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,695.20 : 111,944.40 = 54,880.80 : x
  2. Step 2: Convert to fraction form
    74,695.20/111,944.40 = 54,880.80/x
  3. Step 3: Cross multiply
    74,695.20x = 111,944.40 × 54,880.80
  4. Step 4: Simplify right side
    74,695.20x = 6,143,598,227.52
  5. Step 5: Solve for x
    x = 6,143,598,227.52/74,695.20
  6. Step 6: Final answer
    x = 82,248.90

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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.