Home / 91,747.20-137,701.80-54,260.40

Finding the Fourth Proportional to 91,747.20, 137,701.80 and 54,260.40

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Solution

The fourth proportional to 91,747.20, 137,701.80 and 54,260.40 is: 81,438.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,747.20 : 137,701.80 = 54,260.40 : x
  2. Step 2: Convert to fraction form
    91,747.20/137,701.80 = 54,260.40/x
  3. Step 3: Cross multiply
    91,747.20x = 137,701.80 × 54,260.40
  4. Step 4: Simplify right side
    91,747.20x = 7,471,754,748.72
  5. Step 5: Solve for x
    x = 7,471,754,748.72/91,747.20
  6. Step 6: Final answer
    x = 81,438.50

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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.