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Finding the Fourth Proportional to 260,052.10, 390,078.15 and 126,863.80

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Solution

The fourth proportional to 260,052.10, 390,078.15 and 126,863.80 is: 190,295.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,052.10 : 390,078.15 = 126,863.80 : x
  2. Step 2: Convert to fraction form
    260,052.10/390,078.15 = 126,863.80/x
  3. Step 3: Cross multiply
    260,052.10x = 390,078.15 × 126,863.80
  4. Step 4: Simplify right side
    260,052.10x = 49,486,796,405.97
  5. Step 5: Solve for x
    x = 49,486,796,405.97/260,052.10
  6. Step 6: Final answer
    x = 190,295.70

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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.