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Finding the Fourth Proportional to 143,507.40, 215,121.52 and 68,608.11

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Solution

The fourth proportional to 143,507.40, 215,121.52 and 68,608.11 is: 102,845.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,507.40 : 215,121.52 = 68,608.11 : x
  2. Step 2: Convert to fraction form
    143,507.40/215,121.52 = 68,608.11/x
  3. Step 3: Cross multiply
    143,507.40x = 215,121.52 × 68,608.11
  4. Step 4: Simplify right side
    143,507.40x = 14,759,081,799.99
  5. Step 5: Solve for x
    x = 14,759,081,799.99/143,507.40
  6. Step 6: Final answer
    x = 102,845.44

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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.