Home / 126,015,896.80-189,023,845.20-72,118,885.60

Finding the Fourth Proportional to 126,015,896.80, 189,023,845.20 and 72,118,885.60

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Solution

The fourth proportional to 126,015,896.80, 189,023,845.20 and 72,118,885.60 is: 108,178,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,015,896.80 : 189,023,845.20 = 72,118,885.60 : x
  2. Step 2: Convert to fraction form
    126,015,896.80/189,023,845.20 = 72,118,885.60/x
  3. Step 3: Cross multiply
    126,015,896.80x = 189,023,845.20 × 72,118,885.60
  4. Step 4: Simplify right side
    126,015,896.80x = 13,632,189,067,650,908
  5. Step 5: Solve for x
    x = 13,632,189,067,650,908/126,015,896.80
  6. Step 6: Final answer
    x = 108,178,328.40

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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.