Home / 107,939.39-148,997.39-81,159.66

Finding the Fourth Proportional to 107,939.39, 148,997.39 and 81,159.66

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Solution

The fourth proportional to 107,939.39, 148,997.39 and 81,159.66 is: 112,031.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,939.39 : 148,997.39 = 81,159.66 : x
  2. Step 2: Convert to fraction form
    107,939.39/148,997.39 = 81,159.66/x
  3. Step 3: Cross multiply
    107,939.39x = 148,997.39 × 81,159.66
  4. Step 4: Simplify right side
    107,939.39x = 12,092,577,107.49
  5. Step 5: Solve for x
    x = 12,092,577,107.49/107,939.39
  6. Step 6: Final answer
    x = 112,031.18

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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.