Home / 66,161.39-91,317.16-40,689.67

Finding the Fourth Proportional to 66,161.39, 91,317.16 and 40,689.67

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Solution

The fourth proportional to 66,161.39, 91,317.16 and 40,689.67 is: 56,160.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,161.39 : 91,317.16 = 40,689.67 : x
  2. Step 2: Convert to fraction form
    66,161.39/91,317.16 = 40,689.67/x
  3. Step 3: Cross multiply
    66,161.39x = 91,317.16 × 40,689.67
  4. Step 4: Simplify right side
    66,161.39x = 3,715,664,902.29
  5. Step 5: Solve for x
    x = 3,715,664,902.29/66,161.39
  6. Step 6: Final answer
    x = 56,160.62

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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.