Home / 256,711,010.20-385,025,196.90-74,915,579.80

Finding the Fourth Proportional to 256,711,010.20, 385,025,196.90 and 74,915,579.80

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Solution

The fourth proportional to 256,711,010.20, 385,025,196.90 and 74,915,579.80 is: 112,361,311.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,711,010.20 : 385,025,196.90 = 74,915,579.80 : x
  2. Step 2: Convert to fraction form
    256,711,010.20/385,025,196.90 = 74,915,579.80/x
  3. Step 3: Cross multiply
    256,711,010.20x = 385,025,196.90 × 74,915,579.80
  4. Step 4: Simplify right side
    256,711,010.20x = 28,844,385,863,372,660
  5. Step 5: Solve for x
    x = 28,844,385,863,372,660/256,711,010.20
  6. Step 6: Final answer
    x = 112,361,311.81

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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.