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Finding the Fourth Proportional to 93.31, 139.78 and 88.32

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Solution

The fourth proportional to 93.31, 139.78 and 88.32 is: 132.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.31 : 139.78 = 88.32 : x
  2. Step 2: Convert to fraction form
    93.31/139.78 = 88.32/x
  3. Step 3: Cross multiply
    93.31x = 139.78 × 88.32
  4. Step 4: Simplify right side
    93.31x = 12,345.37
  5. Step 5: Solve for x
    x = 12,345.37/93.31
  6. Step 6: Final answer
    x = 132.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.