Home / 72,485,243.40-100,029,652.38-39,890,195.40

Finding the Fourth Proportional to 72,485,243.40, 100,029,652.38 and 39,890,195.40

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Solution

The fourth proportional to 72,485,243.40, 100,029,652.38 and 39,890,195.40 is: 55,048,478.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,485,243.40 : 100,029,652.38 = 39,890,195.40 : x
  2. Step 2: Convert to fraction form
    72,485,243.40/100,029,652.38 = 39,890,195.40/x
  3. Step 3: Cross multiply
    72,485,243.40x = 100,029,652.38 × 39,890,195.40
  4. Step 4: Simplify right side
    72,485,243.40x = 3,990,202,379,232,274.50
  5. Step 5: Solve for x
    x = 3,990,202,379,232,274.50/72,485,243.40
  6. Step 6: Final answer
    x = 55,048,478.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.