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Finding the Fourth Proportional to 205,966.60, 308,949.90 and 65,739.40

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Solution

The fourth proportional to 205,966.60, 308,949.90 and 65,739.40 is: 98,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,966.60 : 308,949.90 = 65,739.40 : x
  2. Step 2: Convert to fraction form
    205,966.60/308,949.90 = 65,739.40/x
  3. Step 3: Cross multiply
    205,966.60x = 308,949.90 × 65,739.40
  4. Step 4: Simplify right side
    205,966.60x = 20,310,181,056.06
  5. Step 5: Solve for x
    x = 20,310,181,056.06/205,966.60
  6. Step 6: Final answer
    x = 98,609.10

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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.