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Finding the Fourth Proportional to 231,574.79, 319,578.92 and 129,599.43

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Solution

The fourth proportional to 231,574.79, 319,578.92 and 129,599.43 is: 178,850.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,574.79 : 319,578.92 = 129,599.43 : x
  2. Step 2: Convert to fraction form
    231,574.79/319,578.92 = 129,599.43/x
  3. Step 3: Cross multiply
    231,574.79x = 319,578.92 × 129,599.43
  4. Step 4: Simplify right side
    231,574.79x = 41,417,245,224.02
  5. Step 5: Solve for x
    x = 41,417,245,224.02/231,574.79
  6. Step 6: Final answer
    x = 178,850.41

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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.