Home / 231,115.16-318,935.04-129,142.28

Finding the Fourth Proportional to 231,115.16, 318,935.04 and 129,142.28

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Solution

The fourth proportional to 231,115.16, 318,935.04 and 129,142.28 is: 178,214.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,115.16 : 318,935.04 = 129,142.28 : x
  2. Step 2: Convert to fraction form
    231,115.16/318,935.04 = 129,142.28/x
  3. Step 3: Cross multiply
    231,115.16x = 318,935.04 × 129,142.28
  4. Step 4: Simplify right side
    231,115.16x = 41,187,998,237.49
  5. Step 5: Solve for x
    x = 41,187,998,237.49/231,115.16
  6. Step 6: Final answer
    x = 178,214.18

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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.