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Finding the Fourth Proportional to 143,658.44, 215,415.52 and 83,706.28

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Solution

The fourth proportional to 143,658.44, 215,415.52 and 83,706.28 is: 125,517.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,658.44 : 215,415.52 = 83,706.28 : x
  2. Step 2: Convert to fraction form
    143,658.44/215,415.52 = 83,706.28/x
  3. Step 3: Cross multiply
    143,658.44x = 215,415.52 × 83,706.28
  4. Step 4: Simplify right side
    143,658.44x = 18,031,631,833.47
  5. Step 5: Solve for x
    x = 18,031,631,833.47/143,658.44
  6. Step 6: Final answer
    x = 125,517.39

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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.