Home / 138,761.36-191,468.77-81,396.62

Finding the Fourth Proportional to 138,761.36, 191,468.77 and 81,396.62

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Solution

The fourth proportional to 138,761.36, 191,468.77 and 81,396.62 is: 112,314.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,761.36 : 191,468.77 = 81,396.62 : x
  2. Step 2: Convert to fraction form
    138,761.36/191,468.77 = 81,396.62/x
  3. Step 3: Cross multiply
    138,761.36x = 191,468.77 × 81,396.62
  4. Step 4: Simplify right side
    138,761.36x = 15,584,909,552.72
  5. Step 5: Solve for x
    x = 15,584,909,552.72/138,761.36
  6. Step 6: Final answer
    x = 112,314.48

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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.