Home / 81,008.47-121,512.33-21,850.12

Finding the Fourth Proportional to 81,008.47, 121,512.33 and 21,850.12

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Solution

The fourth proportional to 81,008.47, 121,512.33 and 21,850.12 is: 32,775.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,008.47 : 121,512.33 = 21,850.12 : x
  2. Step 2: Convert to fraction form
    81,008.47/121,512.33 = 21,850.12/x
  3. Step 3: Cross multiply
    81,008.47x = 121,512.33 × 21,850.12
  4. Step 4: Simplify right side
    81,008.47x = 2,655,058,991.98
  5. Step 5: Solve for x
    x = 2,655,058,991.98/81,008.47
  6. Step 6: Final answer
    x = 32,775.08

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1.5x scale

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.