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Finding the Fourth Proportional to 93.18, 140.48 and 87.32

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Solution

The fourth proportional to 93.18, 140.48 and 87.32 is: 131.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.18 : 140.48 = 87.32 : x
  2. Step 2: Convert to fraction form
    93.18/140.48 = 87.32/x
  3. Step 3: Cross multiply
    93.18x = 140.48 × 87.32
  4. Step 4: Simplify right side
    93.18x = 12,265.57
  5. Step 5: Solve for x
    x = 12,265.57/93.18
  6. Step 6: Final answer
    x = 131.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.