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Finding the Fourth Proportional to 191,448.56, 287,304.06 and 66,789.56

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Solution

The fourth proportional to 191,448.56, 287,304.06 and 66,789.56 is: 100,230.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,448.56 : 287,304.06 = 66,789.56 : x
  2. Step 2: Convert to fraction form
    191,448.56/287,304.06 = 66,789.56/x
  3. Step 3: Cross multiply
    191,448.56x = 287,304.06 × 66,789.56
  4. Step 4: Simplify right side
    191,448.56x = 19,188,912,722.33
  5. Step 5: Solve for x
    x = 19,188,912,722.33/191,448.56
  6. Step 6: Final answer
    x = 100,230.12

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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.