Home / 138,873.32-191,644.18-75,209.64

Finding the Fourth Proportional to 138,873.32, 191,644.18 and 75,209.64

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Solution

The fourth proportional to 138,873.32, 191,644.18 and 75,209.64 is: 103,788.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,873.32 : 191,644.18 = 75,209.64 : x
  2. Step 2: Convert to fraction form
    138,873.32/191,644.18 = 75,209.64/x
  3. Step 3: Cross multiply
    138,873.32x = 191,644.18 × 75,209.64
  4. Step 4: Simplify right side
    138,873.32x = 14,413,489,785.90
  5. Step 5: Solve for x
    x = 14,413,489,785.90/138,873.32
  6. Step 6: Final answer
    x = 103,788.76

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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.