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Finding the Fourth Proportional to 91,309.70, 136,966.35 and 41,380.58

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Solution

The fourth proportional to 91,309.70, 136,966.35 and 41,380.58 is: 62,071.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,309.70 : 136,966.35 = 41,380.58 : x
  2. Step 2: Convert to fraction form
    91,309.70/136,966.35 = 41,380.58/x
  3. Step 3: Cross multiply
    91,309.70x = 136,966.35 × 41,380.58
  4. Step 4: Simplify right side
    91,309.70x = 5,667,747,003.48
  5. Step 5: Solve for x
    x = 5,667,747,003.48/91,309.70
  6. Step 6: Final answer
    x = 62,071.69

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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.