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Finding the Fourth Proportional to 143,394.36, 215,091.51 and 68,286.78

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Solution

The fourth proportional to 143,394.36, 215,091.51 and 68,286.78 is: 102,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,394.36 : 215,091.51 = 68,286.78 : x
  2. Step 2: Convert to fraction form
    143,394.36/215,091.51 = 68,286.78/x
  3. Step 3: Cross multiply
    143,394.36x = 215,091.51 × 68,286.78
  4. Step 4: Simplify right side
    143,394.36x = 14,687,906,623.24
  5. Step 5: Solve for x
    x = 14,687,906,623.24/143,394.36
  6. Step 6: Final answer
    x = 102,430.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.