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Finding the Fourth Proportional to 66,996,400.80, 100,512,097.20 and 21,559,288.80

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Solution

The fourth proportional to 66,996,400.80, 100,512,097.20 and 21,559,288.80 is: 32,344,563.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,996,400.80 : 100,512,097.20 = 21,559,288.80 : x
  2. Step 2: Convert to fraction form
    66,996,400.80/100,512,097.20 = 21,559,288.80/x
  3. Step 3: Cross multiply
    66,996,400.80x = 100,512,097.20 × 21,559,288.80
  4. Step 4: Simplify right side
    66,996,400.80x = 2,166,969,331,428,471.50
  5. Step 5: Solve for x
    x = 2,166,969,331,428,471.50/66,996,400.80
  6. Step 6: Final answer
    x = 32,344,563.37

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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.