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Finding the Fourth Proportional to 72,659,361.60, 109,010,037.60 and 21,542,610.60

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Solution

The fourth proportional to 72,659,361.60, 109,010,037.60 and 21,542,610.60 is: 32,320,140.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,659,361.60 : 109,010,037.60 = 21,542,610.60 : x
  2. Step 2: Convert to fraction form
    72,659,361.60/109,010,037.60 = 21,542,610.60/x
  3. Step 3: Cross multiply
    72,659,361.60x = 109,010,037.60 × 21,542,610.60
  4. Step 4: Simplify right side
    72,659,361.60x = 2,348,360,791,508,158.50
  5. Step 5: Solve for x
    x = 2,348,360,791,508,158.50/72,659,361.60
  6. Step 6: Final answer
    x = 32,320,140.72

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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.