Home / 66,990.96-92,450.22-40,128.12

Finding the Fourth Proportional to 66,990.96, 92,450.22 and 40,128.12

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Solution

The fourth proportional to 66,990.96, 92,450.22 and 40,128.12 is: 55,378.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,990.96 : 92,450.22 = 40,128.12 : x
  2. Step 2: Convert to fraction form
    66,990.96/92,450.22 = 40,128.12/x
  3. Step 3: Cross multiply
    66,990.96x = 92,450.22 × 40,128.12
  4. Step 4: Simplify right side
    66,990.96x = 3,709,853,522.19
  5. Step 5: Solve for x
    x = 3,709,853,522.19/66,990.96
  6. Step 6: Final answer
    x = 55,378.42

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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.