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Finding the Fourth Proportional to 66,433,212.80, 99,649,819.20 and 64,940,220.80

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Solution

The fourth proportional to 66,433,212.80, 99,649,819.20 and 64,940,220.80 is: 97,410,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,433,212.80 : 99,649,819.20 = 64,940,220.80 : x
  2. Step 2: Convert to fraction form
    66,433,212.80/99,649,819.20 = 64,940,220.80/x
  3. Step 3: Cross multiply
    66,433,212.80x = 99,649,819.20 × 64,940,220.80
  4. Step 4: Simplify right side
    66,433,212.80x = 6,471,281,261,528,079
  5. Step 5: Solve for x
    x = 6,471,281,261,528,079/66,433,212.80
  6. Step 6: Final answer
    x = 97,410,331.20

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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.