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Finding the Fourth Proportional to 81,142.62, 111,974.76 and 45,332.88

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Solution

The fourth proportional to 81,142.62, 111,974.76 and 45,332.88 is: 62,558.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,142.62 : 111,974.76 = 45,332.88 : x
  2. Step 2: Convert to fraction form
    81,142.62/111,974.76 = 45,332.88/x
  3. Step 3: Cross multiply
    81,142.62x = 111,974.76 × 45,332.88
  4. Step 4: Simplify right side
    81,142.62x = 5,076,138,358.11
  5. Step 5: Solve for x
    x = 5,076,138,358.11/81,142.62
  6. Step 6: Final answer
    x = 62,558.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.