Home / 138,767.33-191,507.94-78,315.95

Finding the Fourth Proportional to 138,767.33, 191,507.94 and 78,315.95

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Solution

The fourth proportional to 138,767.33, 191,507.94 and 78,315.95 is: 108,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,767.33 : 191,507.94 = 78,315.95 : x
  2. Step 2: Convert to fraction form
    138,767.33/191,507.94 = 78,315.95/x
  3. Step 3: Cross multiply
    138,767.33x = 191,507.94 × 78,315.95
  4. Step 4: Simplify right side
    138,767.33x = 14,998,125,296.10
  5. Step 5: Solve for x
    x = 14,998,125,296.10/138,767.33
  6. Step 6: Final answer
    x = 108,081.10

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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.