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Finding the Fourth Proportional to 259,993,661.20, 389,990,491.80 and 65,904,701.20

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Solution

The fourth proportional to 259,993,661.20, 389,990,491.80 and 65,904,701.20 is: 98,857,051.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,993,661.20 : 389,990,491.80 = 65,904,701.20 : x
  2. Step 2: Convert to fraction form
    259,993,661.20/389,990,491.80 = 65,904,701.20/x
  3. Step 3: Cross multiply
    259,993,661.20x = 389,990,491.80 × 65,904,701.20
  4. Step 4: Simplify right side
    259,993,661.20x = 25,702,206,832,920,052
  5. Step 5: Solve for x
    x = 25,702,206,832,920,052/259,993,661.20
  6. Step 6: Final answer
    x = 98,857,051.80

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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.