Home / 80,704.25-121,056.98-28,113.65

Finding the Fourth Proportional to 80,704.25, 121,056.98 and 28,113.65

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Solution

The fourth proportional to 80,704.25, 121,056.98 and 28,113.65 is: 42,170.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,704.25 : 121,056.98 = 28,113.65 : x
  2. Step 2: Convert to fraction form
    80,704.25/121,056.98 = 28,113.65/x
  3. Step 3: Cross multiply
    80,704.25x = 121,056.98 × 28,113.65
  4. Step 4: Simplify right side
    80,704.25x = 3,403,353,565.78
  5. Step 5: Solve for x
    x = 3,403,353,565.78/80,704.25
  6. Step 6: Final answer
    x = 42,170.69

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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.