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Finding the Fourth Proportional to 81,656,999.60, 122,485,499.40 and 40,842,330.80

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Solution

The fourth proportional to 81,656,999.60, 122,485,499.40 and 40,842,330.80 is: 61,263,496.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656,999.60 : 122,485,499.40 = 40,842,330.80 : x
  2. Step 2: Convert to fraction form
    81,656,999.60/122,485,499.40 = 40,842,330.80/x
  3. Step 3: Cross multiply
    81,656,999.60x = 122,485,499.40 × 40,842,330.80
  4. Step 4: Simplify right side
    81,656,999.60x = 5,002,593,284,698,001
  5. Step 5: Solve for x
    x = 5,002,593,284,698,001/81,656,999.60
  6. Step 6: Final answer
    x = 61,263,496.20

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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.