Home / 138,498.40-191,167-81,929.44

Finding the Fourth Proportional to 138,498.40, 191,167 and 81,929.44

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Solution

The fourth proportional to 138,498.40, 191,167 and 81,929.44 is: 113,085.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,498.40 : 191,167 = 81,929.44 : x
  2. Step 2: Convert to fraction form
    138,498.40/191,167 = 81,929.44/x
  3. Step 3: Cross multiply
    138,498.40x = 191,167 × 81,929.44
  4. Step 4: Simplify right side
    138,498.40x = 15,662,205,256.48
  5. Step 5: Solve for x
    x = 15,662,205,256.48/138,498.40
  6. Step 6: Final answer
    x = 113,085.82

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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.