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Finding the Fourth Proportional to 92.45, 138.61 and 46.84

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Solution

The fourth proportional to 92.45, 138.61 and 46.84 is: 70.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.45 : 138.61 = 46.84 : x
  2. Step 2: Convert to fraction form
    92.45/138.61 = 46.84/x
  3. Step 3: Cross multiply
    92.45x = 138.61 × 46.84
  4. Step 4: Simplify right side
    92.45x = 6,492.03
  5. Step 5: Solve for x
    x = 6,492.03/92.45
  6. Step 6: Final answer
    x = 70.23

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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.