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Finding the Fourth Proportional to 66,672,020.80, 100,013,560.80 and 21,232,532.80

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Solution

The fourth proportional to 66,672,020.80, 100,013,560.80 and 21,232,532.80 is: 31,850,560.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,672,020.80 : 100,013,560.80 = 21,232,532.80 : x
  2. Step 2: Convert to fraction form
    66,672,020.80/100,013,560.80 = 21,232,532.80/x
  3. Step 3: Cross multiply
    66,672,020.80x = 100,013,560.80 × 21,232,532.80
  4. Step 4: Simplify right side
    66,672,020.80x = 2,123,541,210,130,794.25
  5. Step 5: Solve for x
    x = 2,123,541,210,130,794.25/66,672,020.80
  6. Step 6: Final answer
    x = 31,850,560.17

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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.