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Finding the Fourth Proportional to 66,385.74, 91,611.48 and 36,172.32

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Solution

The fourth proportional to 66,385.74, 91,611.48 and 36,172.32 is: 49,917.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,385.74 : 91,611.48 = 36,172.32 : x
  2. Step 2: Convert to fraction form
    66,385.74/91,611.48 = 36,172.32/x
  3. Step 3: Cross multiply
    66,385.74x = 91,611.48 × 36,172.32
  4. Step 4: Simplify right side
    66,385.74x = 3,313,799,770.23
  5. Step 5: Solve for x
    x = 3,313,799,770.23/66,385.74
  6. Step 6: Final answer
    x = 49,917.34

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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.