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Finding the Fourth Proportional to 90,870.20, 136,046.10 and 80,502.20

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Solution

The fourth proportional to 90,870.20, 136,046.10 and 80,502.20 is: 120,523.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,870.20 : 136,046.10 = 80,502.20 : x
  2. Step 2: Convert to fraction form
    90,870.20/136,046.10 = 80,502.20/x
  3. Step 3: Cross multiply
    90,870.20x = 136,046.10 × 80,502.20
  4. Step 4: Simplify right side
    90,870.20x = 10,952,010,351.42
  5. Step 5: Solve for x
    x = 10,952,010,351.42/90,870.20
  6. Step 6: Final answer
    x = 120,523.67

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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.