Home / 138,747.75-191,451.36-81,365.42

Finding the Fourth Proportional to 138,747.75, 191,451.36 and 81,365.42

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Solution

The fourth proportional to 138,747.75, 191,451.36 and 81,365.42 is: 112,272.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,747.75 : 191,451.36 = 81,365.42 : x
  2. Step 2: Convert to fraction form
    138,747.75/191,451.36 = 81,365.42/x
  3. Step 3: Cross multiply
    138,747.75x = 191,451.36 × 81,365.42
  4. Step 4: Simplify right side
    138,747.75x = 15,577,521,099.72
  5. Step 5: Solve for x
    x = 15,577,521,099.72/138,747.75
  6. Step 6: Final answer
    x = 112,272.25

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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.