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Finding the Fourth Proportional to 231,617.69, 319,605.55 and 129,648.86

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Solution

The fourth proportional to 231,617.69, 319,605.55 and 129,648.86 is: 178,900.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,617.69 : 319,605.55 = 129,648.86 : x
  2. Step 2: Convert to fraction form
    231,617.69/319,605.55 = 129,648.86/x
  3. Step 3: Cross multiply
    231,617.69x = 319,605.55 × 129,648.86
  4. Step 4: Simplify right side
    231,617.69x = 41,436,493,285.02
  5. Step 5: Solve for x
    x = 41,436,493,285.02/231,617.69
  6. Step 6: Final answer
    x = 178,900.39

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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.