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Finding the Fourth Proportional to 81,658.13, 112,679.10 and 45,843.17

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Solution

The fourth proportional to 81,658.13, 112,679.10 and 45,843.17 is: 63,258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,658.13 : 112,679.10 = 45,843.17 : x
  2. Step 2: Convert to fraction form
    81,658.13/112,679.10 = 45,843.17/x
  3. Step 3: Cross multiply
    81,658.13x = 112,679.10 × 45,843.17
  4. Step 4: Simplify right side
    81,658.13x = 5,165,566,573.35
  5. Step 5: Solve for x
    x = 5,165,566,573.35/81,658.13
  6. Step 6: Final answer
    x = 63,258.45

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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.