Home / 80,631.44-120,931.37-76,630.76

Finding the Fourth Proportional to 80,631.44, 120,931.37 and 76,630.76

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Solution

The fourth proportional to 80,631.44, 120,931.37 and 76,630.76 is: 114,931.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,631.44 : 120,931.37 = 76,630.76 : x
  2. Step 2: Convert to fraction form
    80,631.44/120,931.37 = 76,630.76/x
  3. Step 3: Cross multiply
    80,631.44x = 120,931.37 × 76,630.76
  4. Step 4: Simplify right side
    80,631.44x = 9,267,062,407.79
  5. Step 5: Solve for x
    x = 9,267,062,407.79/80,631.44
  6. Step 6: Final answer
    x = 114,931.13

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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.