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Finding the Fourth Proportional to 66,200.49, 91,445.30 and 65,236.84

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Solution

The fourth proportional to 66,200.49, 91,445.30 and 65,236.84 is: 90,114.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,200.49 : 91,445.30 = 65,236.84 : x
  2. Step 2: Convert to fraction form
    66,200.49/91,445.30 = 65,236.84/x
  3. Step 3: Cross multiply
    66,200.49x = 91,445.30 × 65,236.84
  4. Step 4: Simplify right side
    66,200.49x = 5,965,602,976.03
  5. Step 5: Solve for x
    x = 5,965,602,976.03/66,200.49
  6. Step 6: Final answer
    x = 90,114.18

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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.