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Finding the Fourth Proportional to 279,779.40, 419,734.58 and 111,309.26

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Solution

The fourth proportional to 279,779.40, 419,734.58 and 111,309.26 is: 166,989.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,779.40 : 419,734.58 = 111,309.26 : x
  2. Step 2: Convert to fraction form
    279,779.40/419,734.58 = 111,309.26/x
  3. Step 3: Cross multiply
    279,779.40x = 419,734.58 × 111,309.26
  4. Step 4: Simplify right side
    279,779.40x = 46,720,342,840.99
  5. Step 5: Solve for x
    x = 46,720,342,840.99/279,779.40
  6. Step 6: Final answer
    x = 166,989.93

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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.