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Finding the Fourth Proportional to 138,999.65, 191,819.34 and 75,338.51

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Solution

The fourth proportional to 138,999.65, 191,819.34 and 75,338.51 is: 103,967.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,999.65 : 191,819.34 = 75,338.51 : x
  2. Step 2: Convert to fraction form
    138,999.65/191,819.34 = 75,338.51/x
  3. Step 3: Cross multiply
    138,999.65x = 191,819.34 × 75,338.51
  4. Step 4: Simplify right side
    138,999.65x = 14,451,382,305.69
  5. Step 5: Solve for x
    x = 14,451,382,305.69/138,999.65
  6. Step 6: Final answer
    x = 103,967.04

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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.