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Finding the Fourth Proportional to 80,968, 111,732.60 and 45,157.72

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Solution

The fourth proportional to 80,968, 111,732.60 and 45,157.72 is: 62,315.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,968 : 111,732.60 = 45,157.72 : x
  2. Step 2: Convert to fraction form
    80,968/111,732.60 = 45,157.72/x
  3. Step 3: Cross multiply
    80,968x = 111,732.60 × 45,157.72
  4. Step 4: Simplify right side
    80,968x = 5,045,589,465.67
  5. Step 5: Solve for x
    x = 5,045,589,465.67/80,968
  6. Step 6: Final answer
    x = 62,315.85

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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.