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Finding the Fourth Proportional to 115.66, 159.56 and 92.40

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Solution

The fourth proportional to 115.66, 159.56 and 92.40 is: 127.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.66 : 159.56 = 92.40 : x
  2. Step 2: Convert to fraction form
    115.66/159.56 = 92.40/x
  3. Step 3: Cross multiply
    115.66x = 159.56 × 92.40
  4. Step 4: Simplify right side
    115.66x = 14,743.34
  5. Step 5: Solve for x
    x = 14,743.34/115.66
  6. Step 6: Final answer
    x = 127.47

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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.