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Finding the Fourth Proportional to 116.19, 174.34 and 47.77

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Solution

The fourth proportional to 116.19, 174.34 and 47.77 is: 71.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.19 : 174.34 = 47.77 : x
  2. Step 2: Convert to fraction form
    116.19/174.34 = 47.77/x
  3. Step 3: Cross multiply
    116.19x = 174.34 × 47.77
  4. Step 4: Simplify right side
    116.19x = 8,328.22
  5. Step 5: Solve for x
    x = 8,328.22/116.19
  6. Step 6: Final answer
    x = 71.68

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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.