Home / 81,420.20-122,147.74-25,259.10

Finding the Fourth Proportional to 81,420.20, 122,147.74 and 25,259.10

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Solution

The fourth proportional to 81,420.20, 122,147.74 and 25,259.10 is: 37,894.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.20 : 122,147.74 = 25,259.10 : x
  2. Step 2: Convert to fraction form
    81,420.20/122,147.74 = 25,259.10/x
  3. Step 3: Cross multiply
    81,420.20x = 122,147.74 × 25,259.10
  4. Step 4: Simplify right side
    81,420.20x = 3,085,341,979.43
  5. Step 5: Solve for x
    x = 3,085,341,979.43/81,420.20
  6. Step 6: Final answer
    x = 37,894.06

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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.