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Finding the Fourth Proportional to 91,982.40, 137,944.40 and 39,377.76

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Solution

The fourth proportional to 91,982.40, 137,944.40 and 39,377.76 is: 59,054.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,982.40 : 137,944.40 = 39,377.76 : x
  2. Step 2: Convert to fraction form
    91,982.40/137,944.40 = 39,377.76/x
  3. Step 3: Cross multiply
    91,982.40x = 137,944.40 × 39,377.76
  4. Step 4: Simplify right side
    91,982.40x = 5,431,941,476.54
  5. Step 5: Solve for x
    x = 5,431,941,476.54/91,982.40
  6. Step 6: Final answer
    x = 59,054.14

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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.