Home / 138,960.32-191,720.96-85,219.52

Finding the Fourth Proportional to 138,960.32, 191,720.96 and 85,219.52

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Solution

The fourth proportional to 138,960.32, 191,720.96 and 85,219.52 is: 117,575.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,960.32 : 191,720.96 = 85,219.52 : x
  2. Step 2: Convert to fraction form
    138,960.32/191,720.96 = 85,219.52/x
  3. Step 3: Cross multiply
    138,960.32x = 191,720.96 × 85,219.52
  4. Step 4: Simplify right side
    138,960.32x = 16,338,368,185.14
  5. Step 5: Solve for x
    x = 16,338,368,185.14/138,960.32
  6. Step 6: Final answer
    x = 117,575.78

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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.