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Finding the Fourth Proportional to 154,938.80, 213,819.80 and 86,960.00

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Solution

The fourth proportional to 154,938.80, 213,819.80 and 86,960.00 is: 120,007.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,938.80 : 213,819.80 = 86,960.00 : x
  2. Step 2: Convert to fraction form
    154,938.80/213,819.80 = 86,960.00/x
  3. Step 3: Cross multiply
    154,938.80x = 213,819.80 × 86,960.00
  4. Step 4: Simplify right side
    154,938.80x = 18,593,768,304.10
  5. Step 5: Solve for x
    x = 18,593,768,304.10/154,938.80
  6. Step 6: Final answer
    x = 120,007.18

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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.