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Finding the Fourth Proportional to 124.05, 185.95 and 42.84

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Solution

The fourth proportional to 124.05, 185.95 and 42.84 is: 64.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.05 : 185.95 = 42.84 : x
  2. Step 2: Convert to fraction form
    124.05/185.95 = 42.84/x
  3. Step 3: Cross multiply
    124.05x = 185.95 × 42.84
  4. Step 4: Simplify right side
    124.05x = 7,966.10
  5. Step 5: Solve for x
    x = 7,966.10/124.05
  6. Step 6: Final answer
    x = 64.22

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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.