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Finding the Fourth Proportional to 262,779.48, 394,103.61 and 85,337.28

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Solution

The fourth proportional to 262,779.48, 394,103.61 and 85,337.28 is: 127,984.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,779.48 : 394,103.61 = 85,337.28 : x
  2. Step 2: Convert to fraction form
    262,779.48/394,103.61 = 85,337.28/x
  3. Step 3: Cross multiply
    262,779.48x = 394,103.61 × 85,337.28
  4. Step 4: Simplify right side
    262,779.48x = 33,631,730,115.58
  5. Step 5: Solve for x
    x = 33,631,730,115.58/262,779.48
  6. Step 6: Final answer
    x = 127,984.61

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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.