Home / 138,619.68-207,499.32-75,282.72

Finding the Fourth Proportional to 138,619.68, 207,499.32 and 75,282.72

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Solution

The fourth proportional to 138,619.68, 207,499.32 and 75,282.72 is: 112,690.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,619.68 : 207,499.32 = 75,282.72 : x
  2. Step 2: Convert to fraction form
    138,619.68/207,499.32 = 75,282.72/x
  3. Step 3: Cross multiply
    138,619.68x = 207,499.32 × 75,282.72
  4. Step 4: Simplify right side
    138,619.68x = 15,621,113,207.75
  5. Step 5: Solve for x
    x = 15,621,113,207.75/138,619.68
  6. Step 6: Final answer
    x = 112,690.44

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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.