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Finding the Fourth Proportional to 82.98, 123.96 and 70.08

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Solution

The fourth proportional to 82.98, 123.96 and 70.08 is: 104.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.98 : 123.96 = 70.08 : x
  2. Step 2: Convert to fraction form
    82.98/123.96 = 70.08/x
  3. Step 3: Cross multiply
    82.98x = 123.96 × 70.08
  4. Step 4: Simplify right side
    82.98x = 8,687.12
  5. Step 5: Solve for x
    x = 8,687.12/82.98
  6. Step 6: Final answer
    x = 104.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.