Home / 136,721.68-188,676.12-76,290.76

Finding the Fourth Proportional to 136,721.68, 188,676.12 and 76,290.76

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Solution

The fourth proportional to 136,721.68, 188,676.12 and 76,290.76 is: 105,281.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,721.68 : 188,676.12 = 76,290.76 : x
  2. Step 2: Convert to fraction form
    136,721.68/188,676.12 = 76,290.76/x
  3. Step 3: Cross multiply
    136,721.68x = 188,676.12 × 76,290.76
  4. Step 4: Simplify right side
    136,721.68x = 14,394,244,588.65
  5. Step 5: Solve for x
    x = 14,394,244,588.65/136,721.68
  6. Step 6: Final answer
    x = 105,281.36

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1.5x scale

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.