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Finding the Fourth Proportional to 93.12, 128.37 and 60.36

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Solution

The fourth proportional to 93.12, 128.37 and 60.36 is: 83.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.12 : 128.37 = 60.36 : x
  2. Step 2: Convert to fraction form
    93.12/128.37 = 60.36/x
  3. Step 3: Cross multiply
    93.12x = 128.37 × 60.36
  4. Step 4: Simplify right side
    93.12x = 7,748.41
  5. Step 5: Solve for x
    x = 7,748.41/93.12
  6. Step 6: Final answer
    x = 83.21

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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.