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Finding the Fourth Proportional to 115,374.72, 159,220.80 and 65,074.56

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Solution

The fourth proportional to 115,374.72, 159,220.80 and 65,074.56 is: 89,804.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,374.72 : 159,220.80 = 65,074.56 : x
  2. Step 2: Convert to fraction form
    115,374.72/159,220.80 = 65,074.56/x
  3. Step 3: Cross multiply
    115,374.72x = 159,220.80 × 65,074.56
  4. Step 4: Simplify right side
    115,374.72x = 10,361,223,502.85
  5. Step 5: Solve for x
    x = 10,361,223,502.85/115,374.72
  6. Step 6: Final answer
    x = 89,804.97

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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.