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Finding the Fourth Proportional to 93.59, 128.96 and 70.29

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Solution

The fourth proportional to 93.59, 128.96 and 70.29 is: 96.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.59 : 128.96 = 70.29 : x
  2. Step 2: Convert to fraction form
    93.59/128.96 = 70.29/x
  3. Step 3: Cross multiply
    93.59x = 128.96 × 70.29
  4. Step 4: Simplify right side
    93.59x = 9,064.25
  5. Step 5: Solve for x
    x = 9,064.25/93.59
  6. Step 6: Final answer
    x = 96.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.