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Finding the Fourth Proportional to 81,291.54, 112,182.33 and 45,489.97

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Solution

The fourth proportional to 81,291.54, 112,182.33 and 45,489.97 is: 62,776.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,291.54 : 112,182.33 = 45,489.97 : x
  2. Step 2: Convert to fraction form
    81,291.54/112,182.33 = 45,489.97/x
  3. Step 3: Cross multiply
    81,291.54x = 112,182.33 × 45,489.97
  4. Step 4: Simplify right side
    81,291.54x = 5,103,170,826.23
  5. Step 5: Solve for x
    x = 5,103,170,826.23/81,291.54
  6. Step 6: Final answer
    x = 62,776.16

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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.