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Finding the Fourth Proportional to 112.59, 155.39 and 107.01

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Solution

The fourth proportional to 112.59, 155.39 and 107.01 is: 147.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.59 : 155.39 = 107.01 : x
  2. Step 2: Convert to fraction form
    112.59/155.39 = 107.01/x
  3. Step 3: Cross multiply
    112.59x = 155.39 × 107.01
  4. Step 4: Simplify right side
    112.59x = 16,627.75
  5. Step 5: Solve for x
    x = 16,627.75/112.59
  6. Step 6: Final answer
    x = 147.68

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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.