Home / 643,661,845.20-965,492,767.80-158,987,653.20

Finding the Fourth Proportional to 643,661,845.20, 965,492,767.80 and 158,987,653.20

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Solution

The fourth proportional to 643,661,845.20, 965,492,767.80 and 158,987,653.20 is: 238,481,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,661,845.20 : 965,492,767.80 = 158,987,653.20 : x
  2. Step 2: Convert to fraction form
    643,661,845.20/965,492,767.80 = 158,987,653.20/x
  3. Step 3: Cross multiply
    643,661,845.20x = 965,492,767.80 × 158,987,653.20
  4. Step 4: Simplify right side
    643,661,845.20x = 153,501,429,334,094,496
  5. Step 5: Solve for x
    x = 153,501,429,334,094,496/643,661,845.20
  6. Step 6: Final answer
    x = 238,481,479.80

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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.