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Finding the Fourth Proportional to 93.69, 139.86 and 83.43

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Solution

The fourth proportional to 93.69, 139.86 and 83.43 is: 124.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.69 : 139.86 = 83.43 : x
  2. Step 2: Convert to fraction form
    93.69/139.86 = 83.43/x
  3. Step 3: Cross multiply
    93.69x = 139.86 × 83.43
  4. Step 4: Simplify right side
    93.69x = 11,668.52
  5. Step 5: Solve for x
    x = 11,668.52/93.69
  6. Step 6: Final answer
    x = 124.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.