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Finding the Fourth Proportional to 117,779.75, 176,708.51 and 47,620.79

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Solution

The fourth proportional to 117,779.75, 176,708.51 and 47,620.79 is: 71,446.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,779.75 : 176,708.51 = 47,620.79 : x
  2. Step 2: Convert to fraction form
    117,779.75/176,708.51 = 47,620.79/x
  3. Step 3: Cross multiply
    117,779.75x = 176,708.51 × 47,620.79
  4. Step 4: Simplify right side
    117,779.75x = 8,414,998,607.82
  5. Step 5: Solve for x
    x = 8,414,998,607.82/117,779.75
  6. Step 6: Final answer
    x = 71,446.90

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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.