Home / 138,451.81-191,063.67-74,789.61

Finding the Fourth Proportional to 138,451.81, 191,063.67 and 74,789.61

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Solution

The fourth proportional to 138,451.81, 191,063.67 and 74,789.61 is: 103,209.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,451.81 : 191,063.67 = 74,789.61 : x
  2. Step 2: Convert to fraction form
    138,451.81/191,063.67 = 74,789.61/x
  3. Step 3: Cross multiply
    138,451.81x = 191,063.67 × 74,789.61
  4. Step 4: Simplify right side
    138,451.81x = 14,289,577,006.22
  5. Step 5: Solve for x
    x = 14,289,577,006.22/138,451.81
  6. Step 6: Final answer
    x = 103,209.75

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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.