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Finding the Fourth Proportional to 143,871.12, 215,813.16 and 104,239.44

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Solution

The fourth proportional to 143,871.12, 215,813.16 and 104,239.44 is: 156,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,871.12 : 215,813.16 = 104,239.44 : x
  2. Step 2: Convert to fraction form
    143,871.12/215,813.16 = 104,239.44/x
  3. Step 3: Cross multiply
    143,871.12x = 215,813.16 × 104,239.44
  4. Step 4: Simplify right side
    143,871.12x = 22,496,242,943.03
  5. Step 5: Solve for x
    x = 22,496,242,943.03/143,871.12
  6. Step 6: Final answer
    x = 156,363.85

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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.