Home / 138,044.26-190,507.80-77,633.92

Finding the Fourth Proportional to 138,044.26, 190,507.80 and 77,633.92

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Solution

The fourth proportional to 138,044.26, 190,507.80 and 77,633.92 is: 107,138.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,044.26 : 190,507.80 = 77,633.92 : x
  2. Step 2: Convert to fraction form
    138,044.26/190,507.80 = 77,633.92/x
  3. Step 3: Cross multiply
    138,044.26x = 190,507.80 × 77,633.92
  4. Step 4: Simplify right side
    138,044.26x = 14,789,867,304.58
  5. Step 5: Solve for x
    x = 14,789,867,304.58/138,044.26
  6. Step 6: Final answer
    x = 107,138.59

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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.