Home / 80,520.40-120,780.60-47,256.40

Finding the Fourth Proportional to 80,520.40, 120,780.60 and 47,256.40

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Solution

The fourth proportional to 80,520.40, 120,780.60 and 47,256.40 is: 70,884.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,520.40 : 120,780.60 = 47,256.40 : x
  2. Step 2: Convert to fraction form
    80,520.40/120,780.60 = 47,256.40/x
  3. Step 3: Cross multiply
    80,520.40x = 120,780.60 × 47,256.40
  4. Step 4: Simplify right side
    80,520.40x = 5,707,656,345.84
  5. Step 5: Solve for x
    x = 5,707,656,345.84/80,520.40
  6. Step 6: Final answer
    x = 70,884.60

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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.