Home / 138,918.58-208,304.97-72,195.64

Finding the Fourth Proportional to 138,918.58, 208,304.97 and 72,195.64

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Solution

The fourth proportional to 138,918.58, 208,304.97 and 72,195.64 is: 108,255.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,918.58 : 208,304.97 = 72,195.64 : x
  2. Step 2: Convert to fraction form
    138,918.58/208,304.97 = 72,195.64/x
  3. Step 3: Cross multiply
    138,918.58x = 208,304.97 × 72,195.64
  4. Step 4: Simplify right side
    138,918.58x = 15,038,710,624.33
  5. Step 5: Solve for x
    x = 15,038,710,624.33/138,918.58
  6. Step 6: Final answer
    x = 108,255.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.