Home / 138,769.98-191,502.78-75,107.76

Finding the Fourth Proportional to 138,769.98, 191,502.78 and 75,107.76

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Solution

The fourth proportional to 138,769.98, 191,502.78 and 75,107.76 is: 103,648.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,769.98 : 191,502.78 = 75,107.76 : x
  2. Step 2: Convert to fraction form
    138,769.98/191,502.78 = 75,107.76/x
  3. Step 3: Cross multiply
    138,769.98x = 191,502.78 × 75,107.76
  4. Step 4: Simplify right side
    138,769.98x = 14,383,344,839.57
  5. Step 5: Solve for x
    x = 14,383,344,839.57/138,769.98
  6. Step 6: Final answer
    x = 103,648.82

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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.