Home / 80,423.79-120,512.66-42,989.18

Finding the Fourth Proportional to 80,423.79, 120,512.66 and 42,989.18

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Solution

The fourth proportional to 80,423.79, 120,512.66 and 42,989.18 is: 64,418.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,423.79 : 120,512.66 = 42,989.18 : x
  2. Step 2: Convert to fraction form
    80,423.79/120,512.66 = 42,989.18/x
  3. Step 3: Cross multiply
    80,423.79x = 120,512.66 × 42,989.18
  4. Step 4: Simplify right side
    80,423.79x = 5,180,740,535.21
  5. Step 5: Solve for x
    x = 5,180,740,535.21/80,423.79
  6. Step 6: Final answer
    x = 64,418.01

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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.