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Finding the Fourth Proportional to 66,358.55, 91,571.65 and 36,143.73

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Solution

The fourth proportional to 66,358.55, 91,571.65 and 36,143.73 is: 49,876.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,358.55 : 91,571.65 = 36,143.73 : x
  2. Step 2: Convert to fraction form
    66,358.55/91,571.65 = 36,143.73/x
  3. Step 3: Cross multiply
    66,358.55x = 91,571.65 × 36,143.73
  4. Step 4: Simplify right side
    66,358.55x = 3,309,740,902.90
  5. Step 5: Solve for x
    x = 3,309,740,902.90/66,358.55
  6. Step 6: Final answer
    x = 49,876.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.