Home / 231,719.13-319,698.09-129,729.60

Finding the Fourth Proportional to 231,719.13, 319,698.09 and 129,729.60

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Solution

The fourth proportional to 231,719.13, 319,698.09 and 129,729.60 is: 178,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,719.13 : 319,698.09 = 129,729.60 : x
  2. Step 2: Convert to fraction form
    231,719.13/319,698.09 = 129,729.60/x
  3. Step 3: Cross multiply
    231,719.13x = 319,698.09 × 129,729.60
  4. Step 4: Simplify right side
    231,719.13x = 41,474,305,336.46
  5. Step 5: Solve for x
    x = 41,474,305,336.46/231,719.13
  6. Step 6: Final answer
    x = 178,985.25

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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.