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Finding the Fourth Proportional to 115,558.74, 159,469.11 and 64,572.21

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Solution

The fourth proportional to 115,558.74, 159,469.11 and 64,572.21 is: 89,108.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,558.74 : 159,469.11 = 64,572.21 : x
  2. Step 2: Convert to fraction form
    115,558.74/159,469.11 = 64,572.21/x
  3. Step 3: Cross multiply
    115,558.74x = 159,469.11 × 64,572.21
  4. Step 4: Simplify right side
    115,558.74x = 10,297,272,859.43
  5. Step 5: Solve for x
    x = 10,297,272,859.43/115,558.74
  6. Step 6: Final answer
    x = 89,108.56

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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.