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Finding the Fourth Proportional to 206,838.30, 310,315.05 and 101,660.70

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Solution

The fourth proportional to 206,838.30, 310,315.05 and 101,660.70 is: 152,519.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,838.30 : 310,315.05 = 101,660.70 : x
  2. Step 2: Convert to fraction form
    206,838.30/310,315.05 = 101,660.70/x
  3. Step 3: Cross multiply
    206,838.30x = 310,315.05 × 101,660.70
  4. Step 4: Simplify right side
    206,838.30x = 31,546,845,203.54
  5. Step 5: Solve for x
    x = 31,546,845,203.54/206,838.30
  6. Step 6: Final answer
    x = 152,519.36

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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.