Home / 66,121.23-91,255.64-40,974.51

Finding the Fourth Proportional to 66,121.23, 91,255.64 and 40,974.51

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Solution

The fourth proportional to 66,121.23, 91,255.64 and 40,974.51 is: 56,549.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,121.23 : 91,255.64 = 40,974.51 : x
  2. Step 2: Convert to fraction form
    66,121.23/91,255.64 = 40,974.51/x
  3. Step 3: Cross multiply
    66,121.23x = 91,255.64 × 40,974.51
  4. Step 4: Simplify right side
    66,121.23x = 3,739,154,928.86
  5. Step 5: Solve for x
    x = 3,739,154,928.86/66,121.23
  6. Step 6: Final answer
    x = 56,549.99

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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.