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Finding the Fourth Proportional to 93.27, 139.03 and 85.98

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Solution

The fourth proportional to 93.27, 139.03 and 85.98 is: 128.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.27 : 139.03 = 85.98 : x
  2. Step 2: Convert to fraction form
    93.27/139.03 = 85.98/x
  3. Step 3: Cross multiply
    93.27x = 139.03 × 85.98
  4. Step 4: Simplify right side
    93.27x = 11,953.80
  5. Step 5: Solve for x
    x = 11,953.80/93.27
  6. Step 6: Final answer
    x = 128.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.