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Finding the Fourth Proportional to 74.80, 112.06 and 46.96

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Solution

The fourth proportional to 74.80, 112.06 and 46.96 is: 70.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.80 : 112.06 = 46.96 : x
  2. Step 2: Convert to fraction form
    74.80/112.06 = 46.96/x
  3. Step 3: Cross multiply
    74.80x = 112.06 × 46.96
  4. Step 4: Simplify right side
    74.80x = 5,262.34
  5. Step 5: Solve for x
    x = 5,262.34/74.80
  6. Step 6: Final answer
    x = 70.35

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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.