Home / 81,804.20-122,707.82-25,643.05

Finding the Fourth Proportional to 81,804.20, 122,707.82 and 25,643.05

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Solution

The fourth proportional to 81,804.20, 122,707.82 and 25,643.05 is: 38,465.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,804.20 : 122,707.82 = 25,643.05 : x
  2. Step 2: Convert to fraction form
    81,804.20/122,707.82 = 25,643.05/x
  3. Step 3: Cross multiply
    81,804.20x = 122,707.82 × 25,643.05
  4. Step 4: Simplify right side
    81,804.20x = 3,146,602,520.99
  5. Step 5: Solve for x
    x = 3,146,602,520.99/81,804.20
  6. Step 6: Final answer
    x = 38,465.05

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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.