Home / 80,902.26-121,408.06-28,312.20

Finding the Fourth Proportional to 80,902.26, 121,408.06 and 28,312.20

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Solution

The fourth proportional to 80,902.26, 121,408.06 and 28,312.20 is: 42,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,902.26 : 121,408.06 = 28,312.20 : x
  2. Step 2: Convert to fraction form
    80,902.26/121,408.06 = 28,312.20/x
  3. Step 3: Cross multiply
    80,902.26x = 121,408.06 × 28,312.20
  4. Step 4: Simplify right side
    80,902.26x = 3,437,329,276.33
  5. Step 5: Solve for x
    x = 3,437,329,276.33/80,902.26
  6. Step 6: Final answer
    x = 42,487.43

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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.