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Finding the Fourth Proportional to 66,581.39, 91,881.84 and 36,366.72

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Solution

The fourth proportional to 66,581.39, 91,881.84 and 36,366.72 is: 50,185.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,581.39 : 91,881.84 = 36,366.72 : x
  2. Step 2: Convert to fraction form
    66,581.39/91,881.84 = 36,366.72/x
  3. Step 3: Cross multiply
    66,581.39x = 91,881.84 × 36,366.72
  4. Step 4: Simplify right side
    66,581.39x = 3,341,440,688.96
  5. Step 5: Solve for x
    x = 3,341,440,688.96/66,581.39
  6. Step 6: Final answer
    x = 50,185.81

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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.