Home / 231,407.09-319,371.35-129,438.21

Finding the Fourth Proportional to 231,407.09, 319,371.35 and 129,438.21

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Solution

The fourth proportional to 231,407.09, 319,371.35 and 129,438.21 is: 178,641.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,407.09 : 319,371.35 = 129,438.21 : x
  2. Step 2: Convert to fraction form
    231,407.09/319,371.35 = 129,438.21/x
  3. Step 3: Cross multiply
    231,407.09x = 319,371.35 × 129,438.21
  4. Step 4: Simplify right side
    231,407.09x = 41,338,855,222.09
  5. Step 5: Solve for x
    x = 41,338,855,222.09/231,407.09
  6. Step 6: Final answer
    x = 178,641.27

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1.5x scale

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.