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Finding the Fourth Proportional to 205,108.40, 307,489.80 and 106,612.40

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Solution

The fourth proportional to 205,108.40, 307,489.80 and 106,612.40 is: 159,828.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,108.40 : 307,489.80 = 106,612.40 : x
  2. Step 2: Convert to fraction form
    205,108.40/307,489.80 = 106,612.40/x
  3. Step 3: Cross multiply
    205,108.40x = 307,489.80 × 106,612.40
  4. Step 4: Simplify right side
    205,108.40x = 32,782,225,553.52
  5. Step 5: Solve for x
    x = 32,782,225,553.52/205,108.40
  6. Step 6: Final answer
    x = 159,828.78

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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.