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Finding the Fourth Proportional to 68,891.64, 95,071.50 and 66,507.80

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Solution

The fourth proportional to 68,891.64, 95,071.50 and 66,507.80 is: 91,781.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,891.64 : 95,071.50 = 66,507.80 : x
  2. Step 2: Convert to fraction form
    68,891.64/95,071.50 = 66,507.80/x
  3. Step 3: Cross multiply
    68,891.64x = 95,071.50 × 66,507.80
  4. Step 4: Simplify right side
    68,891.64x = 6,322,996,307.70
  5. Step 5: Solve for x
    x = 6,322,996,307.70/68,891.64
  6. Step 6: Final answer
    x = 91,781.76

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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.