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Finding the Fourth Proportional to 342,379.62, 513,748.55 and 140,125.86

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Solution

The fourth proportional to 342,379.62, 513,748.55 and 140,125.86 is: 210,262.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,379.62 : 513,748.55 = 140,125.86 : x
  2. Step 2: Convert to fraction form
    342,379.62/513,748.55 = 140,125.86/x
  3. Step 3: Cross multiply
    342,379.62x = 513,748.55 × 140,125.86
  4. Step 4: Simplify right side
    342,379.62x = 71,989,458,676.87
  5. Step 5: Solve for x
    x = 71,989,458,676.87/342,379.62
  6. Step 6: Final answer
    x = 210,262.10

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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.