Home / 72,485,219.30-100,029,618.92-39,890,171.30

Finding the Fourth Proportional to 72,485,219.30, 100,029,618.92 and 39,890,171.30

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Solution

The fourth proportional to 72,485,219.30, 100,029,618.92 and 39,890,171.30 is: 55,048,445.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,485,219.30 : 100,029,618.92 = 39,890,171.30 : x
  2. Step 2: Convert to fraction form
    72,485,219.30/100,029,618.92 = 39,890,171.30/x
  3. Step 3: Cross multiply
    72,485,219.30x = 100,029,618.92 × 39,890,171.30
  4. Step 4: Simplify right side
    72,485,219.30x = 3,990,198,634,142,320.50
  5. Step 5: Solve for x
    x = 3,990,198,634,142,320.50/72,485,219.30
  6. Step 6: Final answer
    x = 55,048,445.36

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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.