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Finding the Fourth Proportional to 76.32, 114.89 and 59.28

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Solution

The fourth proportional to 76.32, 114.89 and 59.28 is: 89.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.32 : 114.89 = 59.28 : x
  2. Step 2: Convert to fraction form
    76.32/114.89 = 59.28/x
  3. Step 3: Cross multiply
    76.32x = 114.89 × 59.28
  4. Step 4: Simplify right side
    76.32x = 6,810.38
  5. Step 5: Solve for x
    x = 6,810.38/76.32
  6. Step 6: Final answer
    x = 89.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.