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Finding the Fourth Proportional to 91,481.70, 137,222.55 and 54,059.70

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Solution

The fourth proportional to 91,481.70, 137,222.55 and 54,059.70 is: 81,089.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,481.70 : 137,222.55 = 54,059.70 : x
  2. Step 2: Convert to fraction form
    91,481.70/137,222.55 = 54,059.70/x
  3. Step 3: Cross multiply
    91,481.70x = 137,222.55 × 54,059.70
  4. Step 4: Simplify right side
    91,481.70x = 7,418,209,886.24
  5. Step 5: Solve for x
    x = 7,418,209,886.24/91,481.70
  6. Step 6: Final answer
    x = 81,089.55

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1.5x scale

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.