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Finding the Fourth Proportional to 80,570.64, 120,627.57 and 66,952.46

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Solution

The fourth proportional to 80,570.64, 120,627.57 and 66,952.46 is: 100,238.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,570.64 : 120,627.57 = 66,952.46 : x
  2. Step 2: Convert to fraction form
    80,570.64/120,627.57 = 66,952.46/x
  3. Step 3: Cross multiply
    80,570.64x = 120,627.57 × 66,952.46
  4. Step 4: Simplify right side
    80,570.64x = 8,076,312,655.61
  5. Step 5: Solve for x
    x = 8,076,312,655.61/80,570.64
  6. Step 6: Final answer
    x = 100,238.90

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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.