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Finding the Fourth Proportional to 231,693.79, 319,663.07 and 129,704.23

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Solution

The fourth proportional to 231,693.79, 319,663.07 and 129,704.23 is: 178,950.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,693.79 : 319,663.07 = 129,704.23 : x
  2. Step 2: Convert to fraction form
    231,693.79/319,663.07 = 129,704.23/x
  3. Step 3: Cross multiply
    231,693.79x = 319,663.07 × 129,704.23
  4. Step 4: Simplify right side
    231,693.79x = 41,461,650,755.47
  5. Step 5: Solve for x
    x = 41,461,650,755.47/231,693.79
  6. Step 6: Final answer
    x = 178,950.21

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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.