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Finding the Fourth Proportional to 81,107.66, 121,661.43 and 59,061.29

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Solution

The fourth proportional to 81,107.66, 121,661.43 and 59,061.29 is: 88,591.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,107.66 : 121,661.43 = 59,061.29 : x
  2. Step 2: Convert to fraction form
    81,107.66/121,661.43 = 59,061.29/x
  3. Step 3: Cross multiply
    81,107.66x = 121,661.43 × 59,061.29
  4. Step 4: Simplify right side
    81,107.66x = 7,185,480,169.26
  5. Step 5: Solve for x
    x = 7,185,480,169.26/81,107.66
  6. Step 6: Final answer
    x = 88,591.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.