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Finding the Fourth Proportional to 342,389.88, 513,484.25 and 129,003.75

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Solution

The fourth proportional to 342,389.88, 513,484.25 and 129,003.75 is: 193,467.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,389.88 : 513,484.25 = 129,003.75 : x
  2. Step 2: Convert to fraction form
    342,389.88/513,484.25 = 129,003.75/x
  3. Step 3: Cross multiply
    342,389.88x = 513,484.25 × 129,003.75
  4. Step 4: Simplify right side
    342,389.88x = 66,241,393,170.92
  5. Step 5: Solve for x
    x = 66,241,393,170.92/342,389.88
  6. Step 6: Final answer
    x = 193,467.73

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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.