Home / 231,779.29-319,840.20-129,781.37

Finding the Fourth Proportional to 231,779.29, 319,840.20 and 129,781.37

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Solution

The fourth proportional to 231,779.29, 319,840.20 and 129,781.37 is: 179,089.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,779.29 : 319,840.20 = 129,781.37 : x
  2. Step 2: Convert to fraction form
    231,779.29/319,840.20 = 129,781.37/x
  3. Step 3: Cross multiply
    231,779.29x = 319,840.20 × 129,781.37
  4. Step 4: Simplify right side
    231,779.29x = 41,509,298,688.17
  5. Step 5: Solve for x
    x = 41,509,298,688.17/231,779.29
  6. Step 6: Final answer
    x = 179,089.76

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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.