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Finding the Fourth Proportional to 92.35, 138.55 and 65.35

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Solution

The fourth proportional to 92.35, 138.55 and 65.35 is: 98.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.35 : 138.55 = 65.35 : x
  2. Step 2: Convert to fraction form
    92.35/138.55 = 65.35/x
  3. Step 3: Cross multiply
    92.35x = 138.55 × 65.35
  4. Step 4: Simplify right side
    92.35x = 9,054.24
  5. Step 5: Solve for x
    x = 9,054.24/92.35
  6. Step 6: Final answer
    x = 98.04

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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.