Home / 80,292.60-120,438.52-20,321.64

Finding the Fourth Proportional to 80,292.60, 120,438.52 and 20,321.64

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Solution

The fourth proportional to 80,292.60, 120,438.52 and 20,321.64 is: 30,482.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,292.60 : 120,438.52 = 20,321.64 : x
  2. Step 2: Convert to fraction form
    80,292.60/120,438.52 = 20,321.64/x
  3. Step 3: Cross multiply
    80,292.60x = 120,438.52 × 20,321.64
  4. Step 4: Simplify right side
    80,292.60x = 2,447,508,194.77
  5. Step 5: Solve for x
    x = 2,447,508,194.77/80,292.60
  6. Step 6: Final answer
    x = 30,482.36

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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.