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Finding the Fourth Proportional to 343,818.81, 515,611.43 and 119,126.80

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Solution

The fourth proportional to 343,818.81, 515,611.43 and 119,126.80 is: 178,649.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,818.81 : 515,611.43 = 119,126.80 : x
  2. Step 2: Convert to fraction form
    343,818.81/515,611.43 = 119,126.80/x
  3. Step 3: Cross multiply
    343,818.81x = 515,611.43 × 119,126.80
  4. Step 4: Simplify right side
    343,818.81x = 61,423,139,103.69
  5. Step 5: Solve for x
    x = 61,423,139,103.69/343,818.81
  6. Step 6: Final answer
    x = 178,649.73

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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.