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Finding the Fourth Proportional to 115.56, 159.30 and 93.69

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Solution

The fourth proportional to 115.56, 159.30 and 93.69 is: 129.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.56 : 159.30 = 93.69 : x
  2. Step 2: Convert to fraction form
    115.56/159.30 = 93.69/x
  3. Step 3: Cross multiply
    115.56x = 159.30 × 93.69
  4. Step 4: Simplify right side
    115.56x = 14,924.82
  5. Step 5: Solve for x
    x = 14,924.82/115.56
  6. Step 6: Final answer
    x = 129.15

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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.