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Finding the Fourth Proportional to 93.32, 139.90 and 45.26

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Solution

The fourth proportional to 93.32, 139.90 and 45.26 is: 67.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.32 : 139.90 = 45.26 : x
  2. Step 2: Convert to fraction form
    93.32/139.90 = 45.26/x
  3. Step 3: Cross multiply
    93.32x = 139.90 × 45.26
  4. Step 4: Simplify right side
    93.32x = 6,331.87
  5. Step 5: Solve for x
    x = 6,331.87/93.32
  6. Step 6: Final answer
    x = 67.85

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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.