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Finding the Fourth Proportional to 91,064.67, 136,597.02 and 71,107.89

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Solution

The fourth proportional to 91,064.67, 136,597.02 and 71,107.89 is: 106,661.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,064.67 : 136,597.02 = 71,107.89 : x
  2. Step 2: Convert to fraction form
    91,064.67/136,597.02 = 71,107.89/x
  3. Step 3: Cross multiply
    91,064.67x = 136,597.02 × 71,107.89
  4. Step 4: Simplify right side
    91,064.67x = 9,713,125,872.49
  5. Step 5: Solve for x
    x = 9,713,125,872.49/91,064.67
  6. Step 6: Final answer
    x = 106,661.85

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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.