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Finding the Fourth Proportional to 81,290.54, 112,180.95 and 45,488.97

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Solution

The fourth proportional to 81,290.54, 112,180.95 and 45,488.97 is: 62,774.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.54 : 112,180.95 = 45,488.97 : x
  2. Step 2: Convert to fraction form
    81,290.54/112,180.95 = 45,488.97/x
  3. Step 3: Cross multiply
    81,290.54x = 112,180.95 × 45,488.97
  4. Step 4: Simplify right side
    81,290.54x = 5,102,995,869.12
  5. Step 5: Solve for x
    x = 5,102,995,869.12/81,290.54
  6. Step 6: Final answer
    x = 62,774.78

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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.