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Finding the Fourth Proportional to 66,647.22, 91,972.94 and 36,432.55

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Solution

The fourth proportional to 66,647.22, 91,972.94 and 36,432.55 is: 50,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647.22 : 91,972.94 = 36,432.55 : x
  2. Step 2: Convert to fraction form
    66,647.22/91,972.94 = 36,432.55/x
  3. Step 3: Cross multiply
    66,647.22x = 91,972.94 × 36,432.55
  4. Step 4: Simplify right side
    66,647.22x = 3,350,808,735.20
  5. Step 5: Solve for x
    x = 3,350,808,735.20/66,647.22
  6. Step 6: Final answer
    x = 50,276.80

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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.