Home / 81,686,720.80-122,530,081.20-71,609,024.80

Finding the Fourth Proportional to 81,686,720.80, 122,530,081.20 and 71,609,024.80

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Solution

The fourth proportional to 81,686,720.80, 122,530,081.20 and 71,609,024.80 is: 107,413,537.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,686,720.80 : 122,530,081.20 = 71,609,024.80 : x
  2. Step 2: Convert to fraction form
    81,686,720.80/122,530,081.20 = 71,609,024.80/x
  3. Step 3: Cross multiply
    81,686,720.80x = 122,530,081.20 × 71,609,024.80
  4. Step 4: Simplify right side
    81,686,720.80x = 8,774,259,623,396,814
  5. Step 5: Solve for x
    x = 8,774,259,623,396,814/81,686,720.80
  6. Step 6: Final answer
    x = 107,413,537.20

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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.