Home / 138,655.11-191,343.90-74,992.75

Finding the Fourth Proportional to 138,655.11, 191,343.90 and 74,992.75

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Solution

The fourth proportional to 138,655.11, 191,343.90 and 74,992.75 is: 103,489.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,655.11 : 191,343.90 = 74,992.75 : x
  2. Step 2: Convert to fraction form
    138,655.11/191,343.90 = 74,992.75/x
  3. Step 3: Cross multiply
    138,655.11x = 191,343.90 × 74,992.75
  4. Step 4: Simplify right side
    138,655.11x = 14,349,405,256.73
  5. Step 5: Solve for x
    x = 14,349,405,256.73/138,655.11
  6. Step 6: Final answer
    x = 103,489.91

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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.