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Finding the Fourth Proportional to 159,347.70, 219,891.24 and 91,361.40

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Solution

The fourth proportional to 159,347.70, 219,891.24 and 91,361.40 is: 126,073.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,347.70 : 219,891.24 = 91,361.40 : x
  2. Step 2: Convert to fraction form
    159,347.70/219,891.24 = 91,361.40/x
  3. Step 3: Cross multiply
    159,347.70x = 219,891.24 × 91,361.40
  4. Step 4: Simplify right side
    159,347.70x = 20,089,571,534.14
  5. Step 5: Solve for x
    x = 20,089,571,534.14/159,347.70
  6. Step 6: Final answer
    x = 126,073.81

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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.