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Finding the Fourth Proportional to 95.39, 131.63 and 56.58

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Solution

The fourth proportional to 95.39, 131.63 and 56.58 is: 78.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.39 : 131.63 = 56.58 : x
  2. Step 2: Convert to fraction form
    95.39/131.63 = 56.58/x
  3. Step 3: Cross multiply
    95.39x = 131.63 × 56.58
  4. Step 4: Simplify right side
    95.39x = 7,447.63
  5. Step 5: Solve for x
    x = 7,447.63/95.39
  6. Step 6: Final answer
    x = 78.08

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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.