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Finding the Fourth Proportional to 93.18, 139.65 and 70.17

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Solution

The fourth proportional to 93.18, 139.65 and 70.17 is: 105.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.18 : 139.65 = 70.17 : x
  2. Step 2: Convert to fraction form
    93.18/139.65 = 70.17/x
  3. Step 3: Cross multiply
    93.18x = 139.65 × 70.17
  4. Step 4: Simplify right side
    93.18x = 9,798.65
  5. Step 5: Solve for x
    x = 9,798.65/93.18
  6. Step 6: Final answer
    x = 105.16

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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.