Home / 138,869.13-191,639.00-75,206.78

Finding the Fourth Proportional to 138,869.13, 191,639.00 and 75,206.78

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Solution

The fourth proportional to 138,869.13, 191,639.00 and 75,206.78 is: 103,785.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,869.13 : 191,639.00 = 75,206.78 : x
  2. Step 2: Convert to fraction form
    138,869.13/191,639.00 = 75,206.78/x
  3. Step 3: Cross multiply
    138,869.13x = 191,639.00 × 75,206.78
  4. Step 4: Simplify right side
    138,869.13x = 14,412,550,778.19
  5. Step 5: Solve for x
    x = 14,412,550,778.19/138,869.13
  6. Step 6: Final answer
    x = 103,785.13

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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.