Home / 71,209.35-106,820.12-18,618.75

Finding the Fourth Proportional to 71,209.35, 106,820.12 and 18,618.75

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Solution

The fourth proportional to 71,209.35, 106,820.12 and 18,618.75 is: 27,929.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,209.35 : 106,820.12 = 18,618.75 : x
  2. Step 2: Convert to fraction form
    71,209.35/106,820.12 = 18,618.75/x
  3. Step 3: Cross multiply
    71,209.35x = 106,820.12 × 18,618.75
  4. Step 4: Simplify right side
    71,209.35x = 1,988,857,155.80
  5. Step 5: Solve for x
    x = 1,988,857,155.80/71,209.35
  6. Step 6: Final answer
    x = 27,929.72

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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.