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Finding the Fourth Proportional to 119,678.56, 179,574.87 and 74,687.70

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Solution

The fourth proportional to 119,678.56, 179,574.87 and 74,687.70 is: 112,067.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,678.56 : 179,574.87 = 74,687.70 : x
  2. Step 2: Convert to fraction form
    119,678.56/179,574.87 = 74,687.70/x
  3. Step 3: Cross multiply
    119,678.56x = 179,574.87 × 74,687.70
  4. Step 4: Simplify right side
    119,678.56x = 13,412,034,018.10
  5. Step 5: Solve for x
    x = 13,412,034,018.10/119,678.56
  6. Step 6: Final answer
    x = 112,067.14

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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.