Home / 72,983,879.87-100,718,021.05-39,493,359.10

Finding the Fourth Proportional to 72,983,879.87, 100,718,021.05 and 39,493,359.10

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Solution

The fourth proportional to 72,983,879.87, 100,718,021.05 and 39,493,359.10 is: 54,500,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,983,879.87 : 100,718,021.05 = 39,493,359.10 : x
  2. Step 2: Convert to fraction form
    72,983,879.87/100,718,021.05 = 39,493,359.10/x
  3. Step 3: Cross multiply
    72,983,879.87x = 100,718,021.05 × 39,493,359.10
  4. Step 4: Simplify right side
    72,983,879.87x = 3,977,692,973,196,173
  5. Step 5: Solve for x
    x = 3,977,692,973,196,173/72,983,879.87
  6. Step 6: Final answer
    x = 54,500,979.95

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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.