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Finding the Fourth Proportional to 206,726.70, 310,090.05 and 127,929.90

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Solution

The fourth proportional to 206,726.70, 310,090.05 and 127,929.90 is: 191,894.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,726.70 : 310,090.05 = 127,929.90 : x
  2. Step 2: Convert to fraction form
    206,726.70/310,090.05 = 127,929.90/x
  3. Step 3: Cross multiply
    206,726.70x = 310,090.05 × 127,929.90
  4. Step 4: Simplify right side
    206,726.70x = 39,669,789,087.50
  5. Step 5: Solve for x
    x = 39,669,789,087.50/206,726.70
  6. Step 6: Final answer
    x = 191,894.85

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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.