Home / 256,711,009.20-385,025,195.40-74,915,578.80

Finding the Fourth Proportional to 256,711,009.20, 385,025,195.40 and 74,915,578.80

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Solution

The fourth proportional to 256,711,009.20, 385,025,195.40 and 74,915,578.80 is: 112,361,310.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,711,009.20 : 385,025,195.40 = 74,915,578.80 : x
  2. Step 2: Convert to fraction form
    256,711,009.20/385,025,195.40 = 74,915,578.80/x
  3. Step 3: Cross multiply
    256,711,009.20x = 385,025,195.40 × 74,915,578.80
  4. Step 4: Simplify right side
    256,711,009.20x = 28,844,385,365,974,096
  5. Step 5: Solve for x
    x = 28,844,385,365,974,096/256,711,009.20
  6. Step 6: Final answer
    x = 112,361,310.31

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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.