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Finding the Fourth Proportional to 230,990.34, 318,745.94 and 129,001.66

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Solution

The fourth proportional to 230,990.34, 318,745.94 and 129,001.66 is: 178,010.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,990.34 : 318,745.94 = 129,001.66 : x
  2. Step 2: Convert to fraction form
    230,990.34/318,745.94 = 129,001.66/x
  3. Step 3: Cross multiply
    230,990.34x = 318,745.94 × 129,001.66
  4. Step 4: Simplify right side
    230,990.34x = 41,118,755,378.26
  5. Step 5: Solve for x
    x = 41,118,755,378.26/230,990.34
  6. Step 6: Final answer
    x = 178,010.71

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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.