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Finding the Fourth Proportional to 115.98, 159.95 and 79.07

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Solution

The fourth proportional to 115.98, 159.95 and 79.07 is: 109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.98 : 159.95 = 79.07 : x
  2. Step 2: Convert to fraction form
    115.98/159.95 = 79.07/x
  3. Step 3: Cross multiply
    115.98x = 159.95 × 79.07
  4. Step 4: Simplify right side
    115.98x = 12,646.05
  5. Step 5: Solve for x
    x = 12,646.05/115.98
  6. Step 6: Final answer
    x = 109.04

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.