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Finding the Fourth Proportional to 93.76, 128.32 and 93.35

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Solution

The fourth proportional to 93.76, 128.32 and 93.35 is: 127.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.76 : 128.32 = 93.35 : x
  2. Step 2: Convert to fraction form
    93.76/128.32 = 93.35/x
  3. Step 3: Cross multiply
    93.76x = 128.32 × 93.35
  4. Step 4: Simplify right side
    93.76x = 11,978.76
  5. Step 5: Solve for x
    x = 11,978.76/93.76
  6. Step 6: Final answer
    x = 127.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.