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Finding the Fourth Proportional to 93.81, 139.54 and 93.50

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Solution

The fourth proportional to 93.81, 139.54 and 93.50 is: 139.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.81 : 139.54 = 93.50 : x
  2. Step 2: Convert to fraction form
    93.81/139.54 = 93.50/x
  3. Step 3: Cross multiply
    93.81x = 139.54 × 93.50
  4. Step 4: Simplify right side
    93.81x = 13,046.99
  5. Step 5: Solve for x
    x = 13,046.99/93.81
  6. Step 6: Final answer
    x = 139.08

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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.