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Finding the Fourth Proportional to 71,779.28, 107,844.12 and 67,800.56

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Solution

The fourth proportional to 71,779.28, 107,844.12 and 67,800.56 is: 101,866.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,779.28 : 107,844.12 = 67,800.56 : x
  2. Step 2: Convert to fraction form
    71,779.28/107,844.12 = 67,800.56/x
  3. Step 3: Cross multiply
    71,779.28x = 107,844.12 × 67,800.56
  4. Step 4: Simplify right side
    71,779.28x = 7,311,891,728.71
  5. Step 5: Solve for x
    x = 7,311,891,728.71/71,779.28
  6. Step 6: Final answer
    x = 101,866.33

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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.