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Finding the Fourth Proportional to 79,779.66, 119,680.42 and 35,405.43

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Solution

The fourth proportional to 79,779.66, 119,680.42 and 35,405.43 is: 53,112.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,779.66 : 119,680.42 = 35,405.43 : x
  2. Step 2: Convert to fraction form
    79,779.66/119,680.42 = 35,405.43/x
  3. Step 3: Cross multiply
    79,779.66x = 119,680.42 × 35,405.43
  4. Step 4: Simplify right side
    79,779.66x = 4,237,336,045.76
  5. Step 5: Solve for x
    x = 4,237,336,045.76/79,779.66
  6. Step 6: Final answer
    x = 53,112.99

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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.