Home / 81,126.77-121,524.91-66,187.13

Finding the Fourth Proportional to 81,126.77, 121,524.91 and 66,187.13

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Solution

The fourth proportional to 81,126.77, 121,524.91 and 66,187.13 is: 99,145.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,126.77 : 121,524.91 = 66,187.13 : x
  2. Step 2: Convert to fraction form
    81,126.77/121,524.91 = 66,187.13/x
  3. Step 3: Cross multiply
    81,126.77x = 121,524.91 × 66,187.13
  4. Step 4: Simplify right side
    81,126.77x = 8,043,384,243.32
  5. Step 5: Solve for x
    x = 8,043,384,243.32/81,126.77
  6. Step 6: Final answer
    x = 99,145.88

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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.