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Finding the Fourth Proportional to 66,421.32, 91,659.58 and 36,207.22

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Solution

The fourth proportional to 66,421.32, 91,659.58 and 36,207.22 is: 49,964.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,421.32 : 91,659.58 = 36,207.22 : x
  2. Step 2: Convert to fraction form
    66,421.32/91,659.58 = 36,207.22/x
  3. Step 3: Cross multiply
    66,421.32x = 91,659.58 × 36,207.22
  4. Step 4: Simplify right side
    66,421.32x = 3,318,738,578.17
  5. Step 5: Solve for x
    x = 3,318,738,578.17/66,421.32
  6. Step 6: Final answer
    x = 49,964.96

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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.