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Finding the Fourth Proportional to 81,646,403.60, 122,469,605.40 and 75,410,829.20

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Solution

The fourth proportional to 81,646,403.60, 122,469,605.40 and 75,410,829.20 is: 113,116,243.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,646,403.60 : 122,469,605.40 = 75,410,829.20 : x
  2. Step 2: Convert to fraction form
    81,646,403.60/122,469,605.40 = 75,410,829.20/x
  3. Step 3: Cross multiply
    81,646,403.60x = 122,469,605.40 × 75,410,829.20
  4. Step 4: Simplify right side
    81,646,403.60x = 9,235,534,495,010,798
  5. Step 5: Solve for x
    x = 9,235,534,495,010,798/81,646,403.60
  6. Step 6: Final answer
    x = 113,116,243.80

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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.