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Finding the Fourth Proportional to 80,482, 120,621.24 and 70,462.20

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Solution

The fourth proportional to 80,482, 120,621.24 and 70,462.20 is: 105,604.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,482 : 120,621.24 = 70,462.20 : x
  2. Step 2: Convert to fraction form
    80,482/120,621.24 = 70,462.20/x
  3. Step 3: Cross multiply
    80,482x = 120,621.24 × 70,462.20
  4. Step 4: Simplify right side
    80,482x = 8,499,237,937.13
  5. Step 5: Solve for x
    x = 8,499,237,937.13/80,482
  6. Step 6: Final answer
    x = 105,604.21

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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.