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Finding the Fourth Proportional to 66,419.76, 91,659.32 and 36,205.12

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Solution

The fourth proportional to 66,419.76, 91,659.32 and 36,205.12 is: 49,963.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,419.76 : 91,659.32 = 36,205.12 : x
  2. Step 2: Convert to fraction form
    66,419.76/91,659.32 = 36,205.12/x
  3. Step 3: Cross multiply
    66,419.76x = 91,659.32 × 36,205.12
  4. Step 4: Simplify right side
    66,419.76x = 3,318,536,679.72
  5. Step 5: Solve for x
    x = 3,318,536,679.72/66,419.76
  6. Step 6: Final answer
    x = 49,963.09

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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.