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Finding the Fourth Proportional to 93.07, 128.41 and 74.67

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Solution

The fourth proportional to 93.07, 128.41 and 74.67 is: 103.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.07 : 128.41 = 74.67 : x
  2. Step 2: Convert to fraction form
    93.07/128.41 = 74.67/x
  3. Step 3: Cross multiply
    93.07x = 128.41 × 74.67
  4. Step 4: Simplify right side
    93.07x = 9,588.37
  5. Step 5: Solve for x
    x = 9,588.37/93.07
  6. Step 6: Final answer
    x = 103.02

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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.