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Finding the Fourth Proportional to 154,659.28, 213,429.76 and 87,591.28

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Solution

The fourth proportional to 154,659.28, 213,429.76 and 87,591.28 is: 120,875.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,659.28 : 213,429.76 = 87,591.28 : x
  2. Step 2: Convert to fraction form
    154,659.28/213,429.76 = 87,591.28/x
  3. Step 3: Cross multiply
    154,659.28x = 213,429.76 × 87,591.28
  4. Step 4: Simplify right side
    154,659.28x = 18,694,585,868.49
  5. Step 5: Solve for x
    x = 18,694,585,868.49/154,659.28
  6. Step 6: Final answer
    x = 120,875.94

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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.