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Finding the Fourth Proportional to 230,758.90, 318,463.26 and 128,804.20

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Solution

The fourth proportional to 230,758.90, 318,463.26 and 128,804.20 is: 177,758.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,758.90 : 318,463.26 = 128,804.20 : x
  2. Step 2: Convert to fraction form
    230,758.90/318,463.26 = 128,804.20/x
  3. Step 3: Cross multiply
    230,758.90x = 318,463.26 × 128,804.20
  4. Step 4: Simplify right side
    230,758.90x = 41,019,405,433.69
  5. Step 5: Solve for x
    x = 41,019,405,433.69/230,758.90
  6. Step 6: Final answer
    x = 177,758.71

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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.