Home / 231,388.50-319,316.86-129,415.70

Finding the Fourth Proportional to 231,388.50, 319,316.86 and 129,415.70

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Solution

The fourth proportional to 231,388.50, 319,316.86 and 129,415.70 is: 178,594.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,388.50 : 319,316.86 = 129,415.70 : x
  2. Step 2: Convert to fraction form
    231,388.50/319,316.86 = 129,415.70/x
  3. Step 3: Cross multiply
    231,388.50x = 319,316.86 × 129,415.70
  4. Step 4: Simplify right side
    231,388.50x = 41,324,614,656.70
  5. Step 5: Solve for x
    x = 41,324,614,656.70/231,388.50
  6. Step 6: Final answer
    x = 178,594.07

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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.