Home / 80,621.46-120,934.89-28,031.40

Finding the Fourth Proportional to 80,621.46, 120,934.89 and 28,031.40

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Solution

The fourth proportional to 80,621.46, 120,934.89 and 28,031.40 is: 42,048.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,621.46 : 120,934.89 = 28,031.40 : x
  2. Step 2: Convert to fraction form
    80,621.46/120,934.89 = 28,031.40/x
  3. Step 3: Cross multiply
    80,621.46x = 120,934.89 × 28,031.40
  4. Step 4: Simplify right side
    80,621.46x = 3,389,974,275.55
  5. Step 5: Solve for x
    x = 3,389,974,275.55/80,621.46
  6. Step 6: Final answer
    x = 42,048.04

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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.