Home / 81,404.70-122,107.05-57,785.10

Finding the Fourth Proportional to 81,404.70, 122,107.05 and 57,785.10

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Solution

The fourth proportional to 81,404.70, 122,107.05 and 57,785.10 is: 86,677.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,404.70 : 122,107.05 = 57,785.10 : x
  2. Step 2: Convert to fraction form
    81,404.70/122,107.05 = 57,785.10/x
  3. Step 3: Cross multiply
    81,404.70x = 122,107.05 × 57,785.10
  4. Step 4: Simplify right side
    81,404.70x = 7,055,968,094.96
  5. Step 5: Solve for x
    x = 7,055,968,094.96/81,404.70
  6. Step 6: Final answer
    x = 86,677.65

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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.