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Finding the Fourth Proportional to 85,366.10, 128,049.15 and 40,982.15

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Solution

The fourth proportional to 85,366.10, 128,049.15 and 40,982.15 is: 61,473.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,366.10 : 128,049.15 = 40,982.15 : x
  2. Step 2: Convert to fraction form
    85,366.10/128,049.15 = 40,982.15/x
  3. Step 3: Cross multiply
    85,366.10x = 128,049.15 × 40,982.15
  4. Step 4: Simplify right side
    85,366.10x = 5,247,729,472.67
  5. Step 5: Solve for x
    x = 5,247,729,472.67/85,366.10
  6. Step 6: Final answer
    x = 61,473.23

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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.