Home / 135,410.44-186,864.12-74,979.78

Finding the Fourth Proportional to 135,410.44, 186,864.12 and 74,979.78

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Solution

The fourth proportional to 135,410.44, 186,864.12 and 74,979.78 is: 103,470.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,410.44 : 186,864.12 = 74,979.78 : x
  2. Step 2: Convert to fraction form
    135,410.44/186,864.12 = 74,979.78/x
  3. Step 3: Cross multiply
    135,410.44x = 186,864.12 × 74,979.78
  4. Step 4: Simplify right side
    135,410.44x = 14,011,031,074.65
  5. Step 5: Solve for x
    x = 14,011,031,074.65/135,410.44
  6. Step 6: Final answer
    x = 103,470.83

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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.