Home / 81,465,812.90-122,198,719.35-77,686,676.90

Finding the Fourth Proportional to 81,465,812.90, 122,198,719.35 and 77,686,676.90

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Solution

The fourth proportional to 81,465,812.90, 122,198,719.35 and 77,686,676.90 is: 116,530,015.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,465,812.90 : 122,198,719.35 = 77,686,676.90 : x
  2. Step 2: Convert to fraction form
    81,465,812.90/122,198,719.35 = 77,686,676.90/x
  3. Step 3: Cross multiply
    81,465,812.90x = 122,198,719.35 × 77,686,676.90
  4. Step 4: Simplify right side
    81,465,812.90x = 9,493,212,427,737,228
  5. Step 5: Solve for x
    x = 9,493,212,427,737,228/81,465,812.90
  6. Step 6: Final answer
    x = 116,530,015.35

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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.