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Finding the Fourth Proportional to 91,469.70, 137,204.55 and 60,078.15

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Solution

The fourth proportional to 91,469.70, 137,204.55 and 60,078.15 is: 90,117.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,469.70 : 137,204.55 = 60,078.15 : x
  2. Step 2: Convert to fraction form
    91,469.70/137,204.55 = 60,078.15/x
  3. Step 3: Cross multiply
    91,469.70x = 137,204.55 × 60,078.15
  4. Step 4: Simplify right side
    91,469.70x = 8,242,995,535.58
  5. Step 5: Solve for x
    x = 8,242,995,535.58/91,469.70
  6. Step 6: Final answer
    x = 90,117.23

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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.