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Finding the Fourth Proportional to 93.08, 138.88 and 83.30

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Solution

The fourth proportional to 93.08, 138.88 and 83.30 is: 124.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.08 : 138.88 = 83.30 : x
  2. Step 2: Convert to fraction form
    93.08/138.88 = 83.30/x
  3. Step 3: Cross multiply
    93.08x = 138.88 × 83.30
  4. Step 4: Simplify right side
    93.08x = 11,568.11
  5. Step 5: Solve for x
    x = 11,568.11/93.08
  6. Step 6: Final answer
    x = 124.28

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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.