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Finding the Fourth Proportional to 230,658.75, 318,309.23 and 128,684.21

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Solution

The fourth proportional to 230,658.75, 318,309.23 and 128,684.21 is: 177,584.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,658.75 : 318,309.23 = 128,684.21 : x
  2. Step 2: Convert to fraction form
    230,658.75/318,309.23 = 128,684.21/x
  3. Step 3: Cross multiply
    230,658.75x = 318,309.23 × 128,684.21
  4. Step 4: Simplify right side
    230,658.75x = 40,961,369,563.29
  5. Step 5: Solve for x
    x = 40,961,369,563.29/230,658.75
  6. Step 6: Final answer
    x = 177,584.29

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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.