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Finding the Fourth Proportional to 81,699.66, 112,757.81 and 49,886.91

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Solution

The fourth proportional to 81,699.66, 112,757.81 and 49,886.91 is: 68,851.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,699.66 : 112,757.81 = 49,886.91 : x
  2. Step 2: Convert to fraction form
    81,699.66/112,757.81 = 49,886.91/x
  3. Step 3: Cross multiply
    81,699.66x = 112,757.81 × 49,886.91
  4. Step 4: Simplify right side
    81,699.66x = 5,625,138,469.83
  5. Step 5: Solve for x
    x = 5,625,138,469.83/81,699.66
  6. Step 6: Final answer
    x = 68,851.43

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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.