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Finding the Fourth Proportional to 71,919.28, 107,878.92 and 45,568.56

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Solution

The fourth proportional to 71,919.28, 107,878.92 and 45,568.56 is: 68,352.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,919.28 : 107,878.92 = 45,568.56 : x
  2. Step 2: Convert to fraction form
    71,919.28/107,878.92 = 45,568.56/x
  3. Step 3: Cross multiply
    71,919.28x = 107,878.92 × 45,568.56
  4. Step 4: Simplify right side
    71,919.28x = 4,915,887,038.76
  5. Step 5: Solve for x
    x = 4,915,887,038.76/71,919.28
  6. Step 6: Final answer
    x = 68,352.84

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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.