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Finding the Fourth Proportional to 51,039.40, 70,499.78 and 39,247.40

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Solution

The fourth proportional to 51,039.40, 70,499.78 and 39,247.40 is: 54,211.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,039.40 : 70,499.78 = 39,247.40 : x
  2. Step 2: Convert to fraction form
    51,039.40/70,499.78 = 39,247.40/x
  3. Step 3: Cross multiply
    51,039.40x = 70,499.78 × 39,247.40
  4. Step 4: Simplify right side
    51,039.40x = 2,766,933,065.57
  5. Step 5: Solve for x
    x = 2,766,933,065.57/51,039.40
  6. Step 6: Final answer
    x = 54,211.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.