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Finding the Fourth Proportional to 66,964,261.05, 100,446,730.22 and 20,902,268.90

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Solution

The fourth proportional to 66,964,261.05, 100,446,730.22 and 20,902,268.90 is: 31,353,509.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,964,261.05 : 100,446,730.22 = 20,902,268.90 : x
  2. Step 2: Convert to fraction form
    66,964,261.05/100,446,730.22 = 20,902,268.90/x
  3. Step 3: Cross multiply
    66,964,261.05x = 100,446,730.22 × 20,902,268.90
  4. Step 4: Simplify right side
    66,964,261.05x = 2,099,564,564,577,451.25
  5. Step 5: Solve for x
    x = 2,099,564,564,577,451.25/66,964,261.05
  6. Step 6: Final answer
    x = 31,353,509.05

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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.