Home / 138,934.55-191,615.56-85,181.74

Finding the Fourth Proportional to 138,934.55, 191,615.56 and 85,181.74

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Solution

The fourth proportional to 138,934.55, 191,615.56 and 85,181.74 is: 117,480.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,934.55 : 191,615.56 = 85,181.74 : x
  2. Step 2: Convert to fraction form
    138,934.55/191,615.56 = 85,181.74/x
  3. Step 3: Cross multiply
    138,934.55x = 191,615.56 × 85,181.74
  4. Step 4: Simplify right side
    138,934.55x = 16,322,146,119.88
  5. Step 5: Solve for x
    x = 16,322,146,119.88/138,934.55
  6. Step 6: Final answer
    x = 117,480.83

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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.