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Finding the Fourth Proportional to 159,610.86, 220,261.50 and 87,990.84

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Solution

The fourth proportional to 159,610.86, 220,261.50 and 87,990.84 is: 121,426.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,610.86 : 220,261.50 = 87,990.84 : x
  2. Step 2: Convert to fraction form
    159,610.86/220,261.50 = 87,990.84/x
  3. Step 3: Cross multiply
    159,610.86x = 220,261.50 × 87,990.84
  4. Step 4: Simplify right side
    159,610.86x = 19,380,994,404.66
  5. Step 5: Solve for x
    x = 19,380,994,404.66/159,610.86
  6. Step 6: Final answer
    x = 121,426.54

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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.