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Finding the Fourth Proportional to 81,772.80, 112,845.12 and 45,472.80

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Solution

The fourth proportional to 81,772.80, 112,845.12 and 45,472.80 is: 62,751.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,772.80 : 112,845.12 = 45,472.80 : x
  2. Step 2: Convert to fraction form
    81,772.80/112,845.12 = 45,472.80/x
  3. Step 3: Cross multiply
    81,772.80x = 112,845.12 × 45,472.80
  4. Step 4: Simplify right side
    81,772.80x = 5,131,383,572.74
  5. Step 5: Solve for x
    x = 5,131,383,572.74/81,772.80
  6. Step 6: Final answer
    x = 62,751.72

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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.