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Finding the Fourth Proportional to 97.80, 134.55 and 95.10

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Solution

The fourth proportional to 97.80, 134.55 and 95.10 is: 130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.80 : 134.55 = 95.10 : x
  2. Step 2: Convert to fraction form
    97.80/134.55 = 95.10/x
  3. Step 3: Cross multiply
    97.80x = 134.55 × 95.10
  4. Step 4: Simplify right side
    97.80x = 12,795.71
  5. Step 5: Solve for x
    x = 12,795.71/97.80
  6. Step 6: Final answer
    x = 130.84

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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.