Home / 231,823.52-319,900.92-128,450.78

Finding the Fourth Proportional to 231,823.52, 319,900.92 and 128,450.78

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Solution

The fourth proportional to 231,823.52, 319,900.92 and 128,450.78 is: 177,253.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,823.52 : 319,900.92 = 128,450.78 : x
  2. Step 2: Convert to fraction form
    231,823.52/319,900.92 = 128,450.78/x
  3. Step 3: Cross multiply
    231,823.52x = 319,900.92 × 128,450.78
  4. Step 4: Simplify right side
    231,823.52x = 41,091,522,696.72
  5. Step 5: Solve for x
    x = 41,091,522,696.72/231,823.52
  6. Step 6: Final answer
    x = 177,253.47

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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.