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Finding the Fourth Proportional to 91,080.11, 125,699.58 and 68,069.97

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Solution

The fourth proportional to 91,080.11, 125,699.58 and 68,069.97 is: 93,943.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,080.11 : 125,699.58 = 68,069.97 : x
  2. Step 2: Convert to fraction form
    91,080.11/125,699.58 = 68,069.97/x
  3. Step 3: Cross multiply
    91,080.11x = 125,699.58 × 68,069.97
  4. Step 4: Simplify right side
    91,080.11x = 8,556,366,639.61
  5. Step 5: Solve for x
    x = 8,556,366,639.61/91,080.11
  6. Step 6: Final answer
    x = 93,943.31

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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.