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Finding the Fourth Proportional to 231,729.66, 319,712.58 and 129,740.10

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Solution

The fourth proportional to 231,729.66, 319,712.58 and 129,740.10 is: 178,999.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,729.66 : 319,712.58 = 129,740.10 : x
  2. Step 2: Convert to fraction form
    231,729.66/319,712.58 = 129,740.10/x
  3. Step 3: Cross multiply
    231,729.66x = 319,712.58 × 129,740.10
  4. Step 4: Simplify right side
    231,729.66x = 41,479,542,100.46
  5. Step 5: Solve for x
    x = 41,479,542,100.46/231,729.66
  6. Step 6: Final answer
    x = 178,999.71

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.