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Finding the Fourth Proportional to 159,687.78, 220,361.67 and 91,657.50

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Solution

The fourth proportional to 159,687.78, 220,361.67 and 91,657.50 is: 126,483.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,687.78 : 220,361.67 = 91,657.50 : x
  2. Step 2: Convert to fraction form
    159,687.78/220,361.67 = 91,657.50/x
  3. Step 3: Cross multiply
    159,687.78x = 220,361.67 × 91,657.50
  4. Step 4: Simplify right side
    159,687.78x = 20,197,799,768.03
  5. Step 5: Solve for x
    x = 20,197,799,768.03/159,687.78
  6. Step 6: Final answer
    x = 126,483.06

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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.