Home / 81,300.09-121,961.63-25,145.12

Finding the Fourth Proportional to 81,300.09, 121,961.63 and 25,145.12

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Solution

The fourth proportional to 81,300.09, 121,961.63 and 25,145.12 is: 37,721.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,300.09 : 121,961.63 = 25,145.12 : x
  2. Step 2: Convert to fraction form
    81,300.09/121,961.63 = 25,145.12/x
  3. Step 3: Cross multiply
    81,300.09x = 121,961.63 × 25,145.12
  4. Step 4: Simplify right side
    81,300.09x = 3,066,739,821.75
  5. Step 5: Solve for x
    x = 3,066,739,821.75/81,300.09
  6. Step 6: Final answer
    x = 37,721.24

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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.