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Finding the Fourth Proportional to 112.64, 155.46 and 69.01

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Solution

The fourth proportional to 112.64, 155.46 and 69.01 is: 95.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.64 : 155.46 = 69.01 : x
  2. Step 2: Convert to fraction form
    112.64/155.46 = 69.01/x
  3. Step 3: Cross multiply
    112.64x = 155.46 × 69.01
  4. Step 4: Simplify right side
    112.64x = 10,728.16
  5. Step 5: Solve for x
    x = 10,728.16/112.64
  6. Step 6: Final answer
    x = 95.25

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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.