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Finding the Fourth Proportional to 342,745.33, 513,976.08 and 129,476.86

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Solution

The fourth proportional to 342,745.33, 513,976.08 and 129,476.86 is: 194,161.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,745.33 : 513,976.08 = 129,476.86 : x
  2. Step 2: Convert to fraction form
    342,745.33/513,976.08 = 129,476.86/x
  3. Step 3: Cross multiply
    342,745.33x = 513,976.08 × 129,476.86
  4. Step 4: Simplify right side
    342,745.33x = 66,548,008,953.51
  5. Step 5: Solve for x
    x = 66,548,008,953.51/342,745.33
  6. Step 6: Final answer
    x = 194,161.68

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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.