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Finding the Fourth Proportional to 143,415.70, 215,123.31 and 68,308.04

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Solution

The fourth proportional to 143,415.70, 215,123.31 and 68,308.04 is: 102,461.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,415.70 : 215,123.31 = 68,308.04 : x
  2. Step 2: Convert to fraction form
    143,415.70/215,123.31 = 68,308.04/x
  3. Step 3: Cross multiply
    143,415.70x = 215,123.31 × 68,308.04
  4. Step 4: Simplify right side
    143,415.70x = 14,694,652,202.22
  5. Step 5: Solve for x
    x = 14,694,652,202.22/143,415.70
  6. Step 6: Final answer
    x = 102,461.95

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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.