Home / 230,436.23-318,007.82-128,478.29

Finding the Fourth Proportional to 230,436.23, 318,007.82 and 128,478.29

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Solution

The fourth proportional to 230,436.23, 318,007.82 and 128,478.29 is: 177,303.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,436.23 : 318,007.82 = 128,478.29 : x
  2. Step 2: Convert to fraction form
    230,436.23/318,007.82 = 128,478.29/x
  3. Step 3: Cross multiply
    230,436.23x = 318,007.82 × 128,478.29
  4. Step 4: Simplify right side
    230,436.23x = 40,857,099,651.38
  5. Step 5: Solve for x
    x = 40,857,099,651.38/230,436.23
  6. Step 6: Final answer
    x = 177,303.28

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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.