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Finding the Fourth Proportional to 119,955.20, 179,932.80 and 77,964.80

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Solution

The fourth proportional to 119,955.20, 179,932.80 and 77,964.80 is: 116,947.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,955.20 : 179,932.80 = 77,964.80 : x
  2. Step 2: Convert to fraction form
    119,955.20/179,932.80 = 77,964.80/x
  3. Step 3: Cross multiply
    119,955.20x = 179,932.80 × 77,964.80
  4. Step 4: Simplify right side
    119,955.20x = 14,028,424,765.44
  5. Step 5: Solve for x
    x = 14,028,424,765.44/119,955.20
  6. Step 6: Final answer
    x = 116,947.20

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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.