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Finding the Fourth Proportional to 231,042.53, 318,827.29 and 129,047.68

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Solution

The fourth proportional to 231,042.53, 318,827.29 and 129,047.68 is: 178,079.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,042.53 : 318,827.29 = 129,047.68 : x
  2. Step 2: Convert to fraction form
    231,042.53/318,827.29 = 129,047.68/x
  3. Step 3: Cross multiply
    231,042.53x = 318,827.29 × 129,047.68
  4. Step 4: Simplify right side
    231,042.53x = 41,143,922,413.07
  5. Step 5: Solve for x
    x = 41,143,922,413.07/231,042.53
  6. Step 6: Final answer
    x = 178,079.43

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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.