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Finding the Fourth Proportional to 95.12, 131.26 and 56.30

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Solution

The fourth proportional to 95.12, 131.26 and 56.30 is: 77.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.12 : 131.26 = 56.30 : x
  2. Step 2: Convert to fraction form
    95.12/131.26 = 56.30/x
  3. Step 3: Cross multiply
    95.12x = 131.26 × 56.30
  4. Step 4: Simplify right side
    95.12x = 7,389.94
  5. Step 5: Solve for x
    x = 7,389.94/95.12
  6. Step 6: Final answer
    x = 77.69

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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.