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Finding the Fourth Proportional to 76.58, 114.06 and 75.64

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Solution

The fourth proportional to 76.58, 114.06 and 75.64 is: 112.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.58 : 114.06 = 75.64 : x
  2. Step 2: Convert to fraction form
    76.58/114.06 = 75.64/x
  3. Step 3: Cross multiply
    76.58x = 114.06 × 75.64
  4. Step 4: Simplify right side
    76.58x = 8,627.12
  5. Step 5: Solve for x
    x = 8,627.12/76.58
  6. Step 6: Final answer
    x = 112.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.