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Finding the Fourth Proportional to 230,576.70, 318,189.51 and 128,605.26

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Solution

The fourth proportional to 230,576.70, 318,189.51 and 128,605.26 is: 177,471.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,576.70 : 318,189.51 = 128,605.26 : x
  2. Step 2: Convert to fraction form
    230,576.70/318,189.51 = 128,605.26/x
  3. Step 3: Cross multiply
    230,576.70x = 318,189.51 × 128,605.26
  4. Step 4: Simplify right side
    230,576.70x = 40,920,844,662.82
  5. Step 5: Solve for x
    x = 40,920,844,662.82/230,576.70
  6. Step 6: Final answer
    x = 177,471.72

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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.