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Finding the Fourth Proportional to 159,278.85, 219,796.83 and 87,657.03

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Solution

The fourth proportional to 159,278.85, 219,796.83 and 87,657.03 is: 120,962.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,278.85 : 219,796.83 = 87,657.03 : x
  2. Step 2: Convert to fraction form
    159,278.85/219,796.83 = 87,657.03/x
  3. Step 3: Cross multiply
    159,278.85x = 219,796.83 × 87,657.03
  4. Step 4: Simplify right side
    159,278.85x = 19,266,737,321.21
  5. Step 5: Solve for x
    x = 19,266,737,321.21/159,278.85
  6. Step 6: Final answer
    x = 120,962.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.