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Finding the Fourth Proportional to 93.52, 129.58 and 87.28

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Solution

The fourth proportional to 93.52, 129.58 and 87.28 is: 120.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.52 : 129.58 = 87.28 : x
  2. Step 2: Convert to fraction form
    93.52/129.58 = 87.28/x
  3. Step 3: Cross multiply
    93.52x = 129.58 × 87.28
  4. Step 4: Simplify right side
    93.52x = 11,309.74
  5. Step 5: Solve for x
    x = 11,309.74/93.52
  6. Step 6: Final answer
    x = 120.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.