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Finding the Fourth Proportional to 114.35, 157.75 and 79.45

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Solution

The fourth proportional to 114.35, 157.75 and 79.45 is: 109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.35 : 157.75 = 79.45 : x
  2. Step 2: Convert to fraction form
    114.35/157.75 = 79.45/x
  3. Step 3: Cross multiply
    114.35x = 157.75 × 79.45
  4. Step 4: Simplify right side
    114.35x = 12,532.64
  5. Step 5: Solve for x
    x = 12,532.64/114.35
  6. Step 6: Final answer
    x = 109.60

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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.