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Finding the Fourth Proportional to 93.11, 139.67 and 45.05

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Solution

The fourth proportional to 93.11, 139.67 and 45.05 is: 67.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.11 : 139.67 = 45.05 : x
  2. Step 2: Convert to fraction form
    93.11/139.67 = 45.05/x
  3. Step 3: Cross multiply
    93.11x = 139.67 × 45.05
  4. Step 4: Simplify right side
    93.11x = 6,292.13
  5. Step 5: Solve for x
    x = 6,292.13/93.11
  6. Step 6: Final answer
    x = 67.58

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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.