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Finding the Fourth Proportional to 70.32, 97.04 and 49.31

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Solution

The fourth proportional to 70.32, 97.04 and 49.31 is: 68.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.32 : 97.04 = 49.31 : x
  2. Step 2: Convert to fraction form
    70.32/97.04 = 49.31/x
  3. Step 3: Cross multiply
    70.32x = 97.04 × 49.31
  4. Step 4: Simplify right side
    70.32x = 4,784.31
  5. Step 5: Solve for x
    x = 4,784.31/70.32
  6. Step 6: Final answer
    x = 68.04

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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.