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Finding the Fourth Proportional to 93.08, 139.30 and 70.20

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Solution

The fourth proportional to 93.08, 139.30 and 70.20 is: 105.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.08 : 139.30 = 70.20 : x
  2. Step 2: Convert to fraction form
    93.08/139.30 = 70.20/x
  3. Step 3: Cross multiply
    93.08x = 139.30 × 70.20
  4. Step 4: Simplify right side
    93.08x = 9,778.86
  5. Step 5: Solve for x
    x = 9,778.86/93.08
  6. Step 6: Final answer
    x = 105.06

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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.