Home / 312,375.24-431,078.40-169,136.64

Finding the Fourth Proportional to 312,375.24, 431,078.40 and 169,136.64

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Solution

The fourth proportional to 312,375.24, 431,078.40 and 169,136.64 is: 233,408.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,375.24 : 431,078.40 = 169,136.64 : x
  2. Step 2: Convert to fraction form
    312,375.24/431,078.40 = 169,136.64/x
  3. Step 3: Cross multiply
    312,375.24x = 431,078.40 × 169,136.64
  4. Step 4: Simplify right side
    312,375.24x = 72,911,152,152.58
  5. Step 5: Solve for x
    x = 72,911,152,152.58/312,375.24
  6. Step 6: Final answer
    x = 233,408.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.