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Finding the Fourth Proportional to 66,616.29, 91,928.93 and 36,401.72

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Solution

The fourth proportional to 66,616.29, 91,928.93 and 36,401.72 is: 50,233.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,616.29 : 91,928.93 = 36,401.72 : x
  2. Step 2: Convert to fraction form
    66,616.29/91,928.93 = 36,401.72/x
  3. Step 3: Cross multiply
    66,616.29x = 91,928.93 × 36,401.72
  4. Step 4: Simplify right side
    66,616.29x = 3,346,370,528.11
  5. Step 5: Solve for x
    x = 3,346,370,528.11/66,616.29
  6. Step 6: Final answer
    x = 50,233.52

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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.