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Finding the Fourth Proportional to 312,779.57, 469,169.40 and 76,122.25

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Solution

The fourth proportional to 312,779.57, 469,169.40 and 76,122.25 is: 114,183.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,779.57 : 469,169.40 = 76,122.25 : x
  2. Step 2: Convert to fraction form
    312,779.57/469,169.40 = 76,122.25/x
  3. Step 3: Cross multiply
    312,779.57x = 469,169.40 × 76,122.25
  4. Step 4: Simplify right side
    312,779.57x = 35,714,230,359.15
  5. Step 5: Solve for x
    x = 35,714,230,359.15/312,779.57
  6. Step 6: Final answer
    x = 114,183.39

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1.5x scale

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.