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Finding the Fourth Proportional to 91,769.55, 137,654.33 and 68,441.55

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Solution

The fourth proportional to 91,769.55, 137,654.33 and 68,441.55 is: 102,662.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,769.55 : 137,654.33 = 68,441.55 : x
  2. Step 2: Convert to fraction form
    91,769.55/137,654.33 = 68,441.55/x
  3. Step 3: Cross multiply
    91,769.55x = 137,654.33 × 68,441.55
  4. Step 4: Simplify right side
    91,769.55x = 9,421,275,367.20
  5. Step 5: Solve for x
    x = 9,421,275,367.20/91,769.55
  6. Step 6: Final answer
    x = 102,662.33

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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.