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Finding the Fourth Proportional to 66,672,046.80, 100,013,599.80 and 21,232,558.80

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Solution

The fourth proportional to 66,672,046.80, 100,013,599.80 and 21,232,558.80 is: 31,850,599.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,672,046.80 : 100,013,599.80 = 21,232,558.80 : x
  2. Step 2: Convert to fraction form
    66,672,046.80/100,013,599.80 = 21,232,558.80/x
  3. Step 3: Cross multiply
    66,672,046.80x = 100,013,599.80 × 21,232,558.80
  4. Step 4: Simplify right side
    66,672,046.80x = 2,123,544,638,553,168.25
  5. Step 5: Solve for x
    x = 2,123,544,638,553,168.25/66,672,046.80
  6. Step 6: Final answer
    x = 31,850,599.17

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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.