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Finding the Fourth Proportional to 93.98, 140.14 and 91.91

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Solution

The fourth proportional to 93.98, 140.14 and 91.91 is: 137.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.98 : 140.14 = 91.91 : x
  2. Step 2: Convert to fraction form
    93.98/140.14 = 91.91/x
  3. Step 3: Cross multiply
    93.98x = 140.14 × 91.91
  4. Step 4: Simplify right side
    93.98x = 12,880.27
  5. Step 5: Solve for x
    x = 12,880.27/93.98
  6. Step 6: Final answer
    x = 137.05

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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.