Home / 132,486.30-198,479.12-78,289.32

Finding the Fourth Proportional to 132,486.30, 198,479.12 and 78,289.32

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Solution

The fourth proportional to 132,486.30, 198,479.12 and 78,289.32 is: 117,286.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,486.30 : 198,479.12 = 78,289.32 : x
  2. Step 2: Convert to fraction form
    132,486.30/198,479.12 = 78,289.32/x
  3. Step 3: Cross multiply
    132,486.30x = 198,479.12 × 78,289.32
  4. Step 4: Simplify right side
    132,486.30x = 15,538,794,327.30
  5. Step 5: Solve for x
    x = 15,538,794,327.30/132,486.30
  6. Step 6: Final answer
    x = 117,286.05

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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.