Home / 99,813,999.20-149,720,998.80-68,909,064.80

Finding the Fourth Proportional to 99,813,999.20, 149,720,998.80 and 68,909,064.80

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Solution

The fourth proportional to 99,813,999.20, 149,720,998.80 and 68,909,064.80 is: 103,363,597.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,813,999.20 : 149,720,998.80 = 68,909,064.80 : x
  2. Step 2: Convert to fraction form
    99,813,999.20/149,720,998.80 = 68,909,064.80/x
  3. Step 3: Cross multiply
    99,813,999.20x = 149,720,998.80 × 68,909,064.80
  4. Step 4: Simplify right side
    99,813,999.20x = 10,317,134,008,229,922
  5. Step 5: Solve for x
    x = 10,317,134,008,229,922/99,813,999.20
  6. Step 6: Final answer
    x = 103,363,597.20

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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.