Home / 138,115.46-190,625.52-86,456.58

Finding the Fourth Proportional to 138,115.46, 190,625.52 and 86,456.58

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Solution

The fourth proportional to 138,115.46, 190,625.52 and 86,456.58 is: 119,326.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,115.46 : 190,625.52 = 86,456.58 : x
  2. Step 2: Convert to fraction form
    138,115.46/190,625.52 = 86,456.58/x
  3. Step 3: Cross multiply
    138,115.46x = 190,625.52 × 86,456.58
  4. Step 4: Simplify right side
    138,115.46x = 16,480,830,519.92
  5. Step 5: Solve for x
    x = 16,480,830,519.92/138,115.46
  6. Step 6: Final answer
    x = 119,326.48

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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.