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Finding the Fourth Proportional to 206,475.30, 309,712.95 and 117,901.80

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Solution

The fourth proportional to 206,475.30, 309,712.95 and 117,901.80 is: 176,852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,475.30 : 309,712.95 = 117,901.80 : x
  2. Step 2: Convert to fraction form
    206,475.30/309,712.95 = 117,901.80/x
  3. Step 3: Cross multiply
    206,475.30x = 309,712.95 × 117,901.80
  4. Step 4: Simplify right side
    206,475.30x = 36,515,714,288.31
  5. Step 5: Solve for x
    x = 36,515,714,288.31/206,475.30
  6. Step 6: Final answer
    x = 176,852.70

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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.