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Finding the Fourth Proportional to 112.77, 155.54 and 95.45

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Solution

The fourth proportional to 112.77, 155.54 and 95.45 is: 131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.77 : 155.54 = 95.45 : x
  2. Step 2: Convert to fraction form
    112.77/155.54 = 95.45/x
  3. Step 3: Cross multiply
    112.77x = 155.54 × 95.45
  4. Step 4: Simplify right side
    112.77x = 14,845.75
  5. Step 5: Solve for x
    x = 14,845.75/112.77
  6. Step 6: Final answer
    x = 131.65

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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.