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Finding the Fourth Proportional to 81,708.96, 112,761.30 and 45,898.20

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Solution

The fourth proportional to 81,708.96, 112,761.30 and 45,898.20 is: 63,341.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,708.96 : 112,761.30 = 45,898.20 : x
  2. Step 2: Convert to fraction form
    81,708.96/112,761.30 = 45,898.20/x
  3. Step 3: Cross multiply
    81,708.96x = 112,761.30 × 45,898.20
  4. Step 4: Simplify right side
    81,708.96x = 5,175,540,699.66
  5. Step 5: Solve for x
    x = 5,175,540,699.66/81,708.96
  6. Step 6: Final answer
    x = 63,341.16

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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.