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Finding the Fourth Proportional to 91,286.68, 136,706.36 and 75,394.48

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Solution

The fourth proportional to 91,286.68, 136,706.36 and 75,394.48 is: 112,907.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,286.68 : 136,706.36 = 75,394.48 : x
  2. Step 2: Convert to fraction form
    91,286.68/136,706.36 = 75,394.48/x
  3. Step 3: Cross multiply
    91,286.68x = 136,706.36 × 75,394.48
  4. Step 4: Simplify right side
    91,286.68x = 10,306,904,924.89
  5. Step 5: Solve for x
    x = 10,306,904,924.89/91,286.68
  6. Step 6: Final answer
    x = 112,907.00

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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.