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Finding the Fourth Proportional to 207,972.76, 287,002.42 and 112,479.43

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Solution

The fourth proportional to 207,972.76, 287,002.42 and 112,479.43 is: 155,221.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,972.76 : 287,002.42 = 112,479.43 : x
  2. Step 2: Convert to fraction form
    207,972.76/287,002.42 = 112,479.43/x
  3. Step 3: Cross multiply
    207,972.76x = 287,002.42 × 112,479.43
  4. Step 4: Simplify right side
    207,972.76x = 32,281,868,610.22
  5. Step 5: Solve for x
    x = 32,281,868,610.22/207,972.76
  6. Step 6: Final answer
    x = 155,221.62

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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.