Home / 101,331.76-139,857.15-66,815.80

Finding the Fourth Proportional to 101,331.76, 139,857.15 and 66,815.80

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Solution

The fourth proportional to 101,331.76, 139,857.15 and 66,815.80 is: 92,218.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,331.76 : 139,857.15 = 66,815.80 : x
  2. Step 2: Convert to fraction form
    101,331.76/139,857.15 = 66,815.80/x
  3. Step 3: Cross multiply
    101,331.76x = 139,857.15 × 66,815.80
  4. Step 4: Simplify right side
    101,331.76x = 9,344,667,362.97
  5. Step 5: Solve for x
    x = 9,344,667,362.97/101,331.76
  6. Step 6: Final answer
    x = 92,218.54

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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.