Home / 66,121-91,255.30-40,974.28

Finding the Fourth Proportional to 66,121, 91,255.30 and 40,974.28

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Solution

The fourth proportional to 66,121, 91,255.30 and 40,974.28 is: 56,549.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,121 : 91,255.30 = 40,974.28 : x
  2. Step 2: Convert to fraction form
    66,121/91,255.30 = 40,974.28/x
  3. Step 3: Cross multiply
    66,121x = 91,255.30 × 40,974.28
  4. Step 4: Simplify right side
    66,121x = 3,739,120,213.68
  5. Step 5: Solve for x
    x = 3,739,120,213.68/66,121
  6. Step 6: Final answer
    x = 56,549.66

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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.