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Finding the Fourth Proportional to 239,809.55, 330,931.78 and 132,389.78

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Solution

The fourth proportional to 239,809.55, 330,931.78 and 132,389.78 is: 182,694.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,809.55 : 330,931.78 = 132,389.78 : x
  2. Step 2: Convert to fraction form
    239,809.55/330,931.78 = 132,389.78/x
  3. Step 3: Cross multiply
    239,809.55x = 330,931.78 × 132,389.78
  4. Step 4: Simplify right side
    239,809.55x = 43,811,983,563.58
  5. Step 5: Solve for x
    x = 43,811,983,563.58/239,809.55
  6. Step 6: Final answer
    x = 182,694.91

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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.