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Finding the Fourth Proportional to 80,608.65, 120,728.58 and 38,518.32

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Solution

The fourth proportional to 80,608.65, 120,728.58 and 38,518.32 is: 57,689.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,608.65 : 120,728.58 = 38,518.32 : x
  2. Step 2: Convert to fraction form
    80,608.65/120,728.58 = 38,518.32/x
  3. Step 3: Cross multiply
    80,608.65x = 120,728.58 × 38,518.32
  4. Step 4: Simplify right side
    80,608.65x = 4,650,261,706.78
  5. Step 5: Solve for x
    x = 4,650,261,706.78/80,608.65
  6. Step 6: Final answer
    x = 57,689.36

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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.