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Finding the Fourth Proportional to 69,904,708.80, 104,872,809.60 and 21,384,801.60

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Solution

The fourth proportional to 69,904,708.80, 104,872,809.60 and 21,384,801.60 is: 32,082,019.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,904,708.80 : 104,872,809.60 = 21,384,801.60 : x
  2. Step 2: Convert to fraction form
    69,904,708.80/104,872,809.60 = 21,384,801.60/x
  3. Step 3: Cross multiply
    69,904,708.80x = 104,872,809.60 × 21,384,801.60
  4. Step 4: Simplify right side
    69,904,708.80x = 2,242,684,226,530,575.50
  5. Step 5: Solve for x
    x = 2,242,684,226,530,575.50/69,904,708.80
  6. Step 6: Final answer
    x = 32,082,019.44

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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.