Home / 138,573.12-191,231.04-74,910.92

Finding the Fourth Proportional to 138,573.12, 191,231.04 and 74,910.92

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Solution

The fourth proportional to 138,573.12, 191,231.04 and 74,910.92 is: 103,377.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,573.12 : 191,231.04 = 74,910.92 : x
  2. Step 2: Convert to fraction form
    138,573.12/191,231.04 = 74,910.92/x
  3. Step 3: Cross multiply
    138,573.12x = 191,231.04 × 74,910.92
  4. Step 4: Simplify right side
    138,573.12x = 14,325,293,138.96
  5. Step 5: Solve for x
    x = 14,325,293,138.96/138,573.12
  6. Step 6: Final answer
    x = 103,377.14

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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.