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Finding the Fourth Proportional to 93.91, 129.63 and 75.53

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Solution

The fourth proportional to 93.91, 129.63 and 75.53 is: 104.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.91 : 129.63 = 75.53 : x
  2. Step 2: Convert to fraction form
    93.91/129.63 = 75.53/x
  3. Step 3: Cross multiply
    93.91x = 129.63 × 75.53
  4. Step 4: Simplify right side
    93.91x = 9,790.31
  5. Step 5: Solve for x
    x = 9,790.31/93.91
  6. Step 6: Final answer
    x = 104.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.