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Finding the Fourth Proportional to 143,383.40, 215,002.20 and 84,237.20

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Solution

The fourth proportional to 143,383.40, 215,002.20 and 84,237.20 is: 126,312.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,383.40 : 215,002.20 = 84,237.20 : x
  2. Step 2: Convert to fraction form
    143,383.40/215,002.20 = 84,237.20/x
  3. Step 3: Cross multiply
    143,383.40x = 215,002.20 × 84,237.20
  4. Step 4: Simplify right side
    143,383.40x = 18,111,183,321.84
  5. Step 5: Solve for x
    x = 18,111,183,321.84/143,383.40
  6. Step 6: Final answer
    x = 126,312.97

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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.