Home / 81,127.27-121,525.66-66,187.63

Finding the Fourth Proportional to 81,127.27, 121,525.66 and 66,187.63

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Solution

The fourth proportional to 81,127.27, 121,525.66 and 66,187.63 is: 99,146.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,127.27 : 121,525.66 = 66,187.63 : x
  2. Step 2: Convert to fraction form
    81,127.27/121,525.66 = 66,187.63/x
  3. Step 3: Cross multiply
    81,127.27x = 121,525.66 × 66,187.63
  4. Step 4: Simplify right side
    81,127.27x = 8,043,494,481.02
  5. Step 5: Solve for x
    x = 8,043,494,481.02/81,127.27
  6. Step 6: Final answer
    x = 99,146.62

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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.