Home / 256,635,695.25-384,799,809.53-81,683,157.78

Finding the Fourth Proportional to 256,635,695.25, 384,799,809.53 and 81,683,157.78

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Solution

The fourth proportional to 256,635,695.25, 384,799,809.53 and 81,683,157.78 is: 122,475,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,635,695.25 : 384,799,809.53 = 81,683,157.78 : x
  2. Step 2: Convert to fraction form
    256,635,695.25/384,799,809.53 = 81,683,157.78/x
  3. Step 3: Cross multiply
    256,635,695.25x = 384,799,809.53 × 81,683,157.78
  4. Step 4: Simplify right side
    256,635,695.25x = 31,431,663,555,757,148
  5. Step 5: Solve for x
    x = 31,431,663,555,757,148/256,635,695.25
  6. Step 6: Final answer
    x = 122,475,805.73

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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.