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Finding the Fourth Proportional to 159,376.90, 219,941.60 and 87,758.56

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Solution

The fourth proportional to 159,376.90, 219,941.60 and 87,758.56 is: 121,107.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,376.90 : 219,941.60 = 87,758.56 : x
  2. Step 2: Convert to fraction form
    159,376.90/219,941.60 = 87,758.56/x
  3. Step 3: Cross multiply
    159,376.90x = 219,941.60 × 87,758.56
  4. Step 4: Simplify right side
    159,376.90x = 19,301,758,100.10
  5. Step 5: Solve for x
    x = 19,301,758,100.10/159,376.90
  6. Step 6: Final answer
    x = 121,107.63

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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.