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Finding the Fourth Proportional to 80,894.57, 121,396.52 and 28,304.51

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Solution

The fourth proportional to 80,894.57, 121,396.52 and 28,304.51 is: 42,475.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,894.57 : 121,396.52 = 28,304.51 : x
  2. Step 2: Convert to fraction form
    80,894.57/121,396.52 = 28,304.51/x
  3. Step 3: Cross multiply
    80,894.57x = 121,396.52 × 28,304.51
  4. Step 4: Simplify right side
    80,894.57x = 3,436,068,478.08
  5. Step 5: Solve for x
    x = 3,436,068,478.08/80,894.57
  6. Step 6: Final answer
    x = 42,475.89

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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.