Home / 81,921.60-113,024.77-66,788.25

Finding the Fourth Proportional to 81,921.60, 113,024.77 and 66,788.25

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Solution

The fourth proportional to 81,921.60, 113,024.77 and 66,788.25 is: 92,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,921.60 : 113,024.77 = 66,788.25 : x
  2. Step 2: Convert to fraction form
    81,921.60/113,024.77 = 66,788.25/x
  3. Step 3: Cross multiply
    81,921.60x = 113,024.77 × 66,788.25
  4. Step 4: Simplify right side
    81,921.60x = 7,548,726,029.83
  5. Step 5: Solve for x
    x = 7,548,726,029.83/81,921.60
  6. Step 6: Final answer
    x = 92,145.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.