Home / 138,036.60-190,409.31-86,959.22

Finding the Fourth Proportional to 138,036.60, 190,409.31 and 86,959.22

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Solution

The fourth proportional to 138,036.60, 190,409.31 and 86,959.22 is: 119,952.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,036.60 : 190,409.31 = 86,959.22 : x
  2. Step 2: Convert to fraction form
    138,036.60/190,409.31 = 86,959.22/x
  3. Step 3: Cross multiply
    138,036.60x = 190,409.31 × 86,959.22
  4. Step 4: Simplify right side
    138,036.60x = 16,557,844,126.29
  5. Step 5: Solve for x
    x = 16,557,844,126.29/138,036.60
  6. Step 6: Final answer
    x = 119,952.56

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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.