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Finding the Fourth Proportional to 115.59, 159.56 and 71.94

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Solution

The fourth proportional to 115.59, 159.56 and 71.94 is: 99.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.59 : 159.56 = 71.94 : x
  2. Step 2: Convert to fraction form
    115.59/159.56 = 71.94/x
  3. Step 3: Cross multiply
    115.59x = 159.56 × 71.94
  4. Step 4: Simplify right side
    115.59x = 11,478.75
  5. Step 5: Solve for x
    x = 11,478.75/115.59
  6. Step 6: Final answer
    x = 99.31

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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.