Home / 136,731.28-188,688.79-76,301.28

Finding the Fourth Proportional to 136,731.28, 188,688.79 and 76,301.28

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Solution

The fourth proportional to 136,731.28, 188,688.79 and 76,301.28 is: 105,295.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,731.28 : 188,688.79 = 76,301.28 : x
  2. Step 2: Convert to fraction form
    136,731.28/188,688.79 = 76,301.28/x
  3. Step 3: Cross multiply
    136,731.28x = 188,688.79 × 76,301.28
  4. Step 4: Simplify right side
    136,731.28x = 14,397,196,198.65
  5. Step 5: Solve for x
    x = 14,397,196,198.65/136,731.28
  6. Step 6: Final answer
    x = 105,295.56

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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.