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Finding the Fourth Proportional to 66,964,259.55, 100,446,727.97 and 20,902,267.40

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Solution

The fourth proportional to 66,964,259.55, 100,446,727.97 and 20,902,267.40 is: 31,353,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,964,259.55 : 100,446,727.97 = 20,902,267.40 : x
  2. Step 2: Convert to fraction form
    66,964,259.55/100,446,727.97 = 20,902,267.40/x
  3. Step 3: Cross multiply
    66,964,259.55x = 100,446,727.97 × 20,902,267.40
  4. Step 4: Simplify right side
    66,964,259.55x = 2,099,564,366,877,254.25
  5. Step 5: Solve for x
    x = 2,099,564,366,877,254.25/66,964,259.55
  6. Step 6: Final answer
    x = 31,353,506.80

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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.