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Finding the Fourth Proportional to 209,805.78, 314,753.52 and 67,659.15

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Solution

The fourth proportional to 209,805.78, 314,753.52 and 67,659.15 is: 101,503.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,805.78 : 314,753.52 = 67,659.15 : x
  2. Step 2: Convert to fraction form
    209,805.78/314,753.52 = 67,659.15/x
  3. Step 3: Cross multiply
    209,805.78x = 314,753.52 × 67,659.15
  4. Step 4: Simplify right side
    209,805.78x = 21,295,955,622.71
  5. Step 5: Solve for x
    x = 21,295,955,622.71/209,805.78
  6. Step 6: Final answer
    x = 101,503.19

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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.