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Finding the Fourth Proportional to 343,819.81, 515,612.92 and 119,127.80

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Solution

The fourth proportional to 343,819.81, 515,612.92 and 119,127.80 is: 178,651.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,819.81 : 515,612.92 = 119,127.80 : x
  2. Step 2: Convert to fraction form
    343,819.81/515,612.92 = 119,127.80/x
  3. Step 3: Cross multiply
    343,819.81x = 515,612.92 × 119,127.80
  4. Step 4: Simplify right side
    343,819.81x = 61,423,832,811.18
  5. Step 5: Solve for x
    x = 61,423,832,811.18/343,819.81
  6. Step 6: Final answer
    x = 178,651.23

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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.