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Finding the Fourth Proportional to 143,815.05, 215,750.88 and 43,989.48

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Solution

The fourth proportional to 143,815.05, 215,750.88 and 43,989.48 is: 65,992.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,815.05 : 215,750.88 = 43,989.48 : x
  2. Step 2: Convert to fraction form
    143,815.05/215,750.88 = 43,989.48/x
  3. Step 3: Cross multiply
    143,815.05x = 215,750.88 × 43,989.48
  4. Step 4: Simplify right side
    143,815.05x = 9,490,769,020.74
  5. Step 5: Solve for x
    x = 9,490,769,020.74/143,815.05
  6. Step 6: Final answer
    x = 65,992.88

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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.