Home / 81,127,633.86-121,695,883.11-20,543,884.74

Finding the Fourth Proportional to 81,127,633.86, 121,695,883.11 and 20,543,884.74

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Solution

The fourth proportional to 81,127,633.86, 121,695,883.11 and 20,543,884.74 is: 30,816,949.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,127,633.86 : 121,695,883.11 = 20,543,884.74 : x
  2. Step 2: Convert to fraction form
    81,127,633.86/121,695,883.11 = 20,543,884.74/x
  3. Step 3: Cross multiply
    81,127,633.86x = 121,695,883.11 × 20,543,884.74
  4. Step 4: Simplify right side
    81,127,633.86x = 2,500,106,195,944,352.50
  5. Step 5: Solve for x
    x = 2,500,106,195,944,352.50/81,127,633.86
  6. Step 6: Final answer
    x = 30,816,949.50

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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.