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Finding the Fourth Proportional to 64,152,012.80, 96,231,705.60 and 18,720,819.20

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Solution

The fourth proportional to 64,152,012.80, 96,231,705.60 and 18,720,819.20 is: 28,082,304.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,152,012.80 : 96,231,705.60 = 18,720,819.20 : x
  2. Step 2: Convert to fraction form
    64,152,012.80/96,231,705.60 = 18,720,819.20/x
  3. Step 3: Cross multiply
    64,152,012.80x = 96,231,705.60 × 18,720,819.20
  4. Step 4: Simplify right side
    64,152,012.80x = 1,801,536,361,845,227.25
  5. Step 5: Solve for x
    x = 1,801,536,361,845,227.25/64,152,012.80
  6. Step 6: Final answer
    x = 28,082,304.56

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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.