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Finding the Fourth Proportional to 93.29, 128.76 and 63.83

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Solution

The fourth proportional to 93.29, 128.76 and 63.83 is: 88.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.29 : 128.76 = 63.83 : x
  2. Step 2: Convert to fraction form
    93.29/128.76 = 63.83/x
  3. Step 3: Cross multiply
    93.29x = 128.76 × 63.83
  4. Step 4: Simplify right side
    93.29x = 8,219.07
  5. Step 5: Solve for x
    x = 8,219.07/93.29
  6. Step 6: Final answer
    x = 88.10

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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.