Home / 138,808.86-191,544.66-81,442.19

Finding the Fourth Proportional to 138,808.86, 191,544.66 and 81,442.19

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Solution

The fourth proportional to 138,808.86, 191,544.66 and 81,442.19 is: 112,383.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808.86 : 191,544.66 = 81,442.19 : x
  2. Step 2: Convert to fraction form
    138,808.86/191,544.66 = 81,442.19/x
  3. Step 3: Cross multiply
    138,808.86x = 191,544.66 × 81,442.19
  4. Step 4: Simplify right side
    138,808.86x = 15,599,815,635.48
  5. Step 5: Solve for x
    x = 15,599,815,635.48/138,808.86
  6. Step 6: Final answer
    x = 112,383.43

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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.