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Finding the Fourth Proportional to 77.83, 116.59 and 47.30

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Solution

The fourth proportional to 77.83, 116.59 and 47.30 is: 70.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.83 : 116.59 = 47.30 : x
  2. Step 2: Convert to fraction form
    77.83/116.59 = 47.30/x
  3. Step 3: Cross multiply
    77.83x = 116.59 × 47.30
  4. Step 4: Simplify right side
    77.83x = 5,514.71
  5. Step 5: Solve for x
    x = 5,514.71/77.83
  6. Step 6: Final answer
    x = 70.86

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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.