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Finding the Fourth Proportional to 76.21, 114.37 and 55.98

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Solution

The fourth proportional to 76.21, 114.37 and 55.98 is: 84.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.21 : 114.37 = 55.98 : x
  2. Step 2: Convert to fraction form
    76.21/114.37 = 55.98/x
  3. Step 3: Cross multiply
    76.21x = 114.37 × 55.98
  4. Step 4: Simplify right side
    76.21x = 6,402.00
  5. Step 5: Solve for x
    x = 6,402.00/76.21
  6. Step 6: Final answer
    x = 84.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.