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Finding the Fourth Proportional to 93.40, 139.82 and 70.60

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Solution

The fourth proportional to 93.40, 139.82 and 70.60 is: 105.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.40 : 139.82 = 70.60 : x
  2. Step 2: Convert to fraction form
    93.40/139.82 = 70.60/x
  3. Step 3: Cross multiply
    93.40x = 139.82 × 70.60
  4. Step 4: Simplify right side
    93.40x = 9,871.29
  5. Step 5: Solve for x
    x = 9,871.29/93.40
  6. Step 6: Final answer
    x = 105.69

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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.