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Finding the Fourth Proportional to 84.86, 117.12 and 48.03

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Solution

The fourth proportional to 84.86, 117.12 and 48.03 is: 66.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.86 : 117.12 = 48.03 : x
  2. Step 2: Convert to fraction form
    84.86/117.12 = 48.03/x
  3. Step 3: Cross multiply
    84.86x = 117.12 × 48.03
  4. Step 4: Simplify right side
    84.86x = 5,624.45
  5. Step 5: Solve for x
    x = 5,624.45/84.86
  6. Step 6: Final answer
    x = 66.28

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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.