Home / 91,765.45-137,729.18-54,278.65

Finding the Fourth Proportional to 91,765.45, 137,729.18 and 54,278.65

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Solution

The fourth proportional to 91,765.45, 137,729.18 and 54,278.65 is: 81,465.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,765.45 : 137,729.18 = 54,278.65 : x
  2. Step 2: Convert to fraction form
    91,765.45/137,729.18 = 54,278.65/x
  3. Step 3: Cross multiply
    91,765.45x = 137,729.18 × 54,278.65
  4. Step 4: Simplify right side
    91,765.45x = 7,475,753,684.61
  5. Step 5: Solve for x
    x = 7,475,753,684.61/91,765.45
  6. Step 6: Final answer
    x = 81,465.89

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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.