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Finding the Fourth Proportional to 159,379.25, 219,943.15 and 87,759.45

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Solution

The fourth proportional to 159,379.25, 219,943.15 and 87,759.45 is: 121,107.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,379.25 : 219,943.15 = 87,759.45 : x
  2. Step 2: Convert to fraction form
    159,379.25/219,943.15 = 87,759.45/x
  3. Step 3: Cross multiply
    159,379.25x = 219,943.15 × 87,759.45
  4. Step 4: Simplify right side
    159,379.25x = 19,302,089,655.87
  5. Step 5: Solve for x
    x = 19,302,089,655.87/159,379.25
  6. Step 6: Final answer
    x = 121,107.93

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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.