Home / 643,661,841.20-965,492,761.80-158,987,649.20

Finding the Fourth Proportional to 643,661,841.20, 965,492,761.80 and 158,987,649.20

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Solution

The fourth proportional to 643,661,841.20, 965,492,761.80 and 158,987,649.20 is: 238,481,473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,661,841.20 : 965,492,761.80 = 158,987,649.20 : x
  2. Step 2: Convert to fraction form
    643,661,841.20/965,492,761.80 = 158,987,649.20/x
  3. Step 3: Cross multiply
    643,661,841.20x = 965,492,761.80 × 158,987,649.20
  4. Step 4: Simplify right side
    643,661,841.20x = 153,501,424,518,197,536
  5. Step 5: Solve for x
    x = 153,501,424,518,197,536/643,661,841.20
  6. Step 6: Final answer
    x = 238,481,473.80

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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.