Home / 138,799.54-191,529.10-80,647.21

Finding the Fourth Proportional to 138,799.54, 191,529.10 and 80,647.21

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Solution

The fourth proportional to 138,799.54, 191,529.10 and 80,647.21 is: 111,284.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,799.54 : 191,529.10 = 80,647.21 : x
  2. Step 2: Convert to fraction form
    138,799.54/191,529.10 = 80,647.21/x
  3. Step 3: Cross multiply
    138,799.54x = 191,529.10 × 80,647.21
  4. Step 4: Simplify right side
    138,799.54x = 15,446,287,548.81
  5. Step 5: Solve for x
    x = 15,446,287,548.81/138,799.54
  6. Step 6: Final answer
    x = 111,284.86

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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.