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Finding the Fourth Proportional to 66,709.53, 99,932.81 and 54,243.63

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Solution

The fourth proportional to 66,709.53, 99,932.81 and 54,243.63 is: 81,258.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,709.53 : 99,932.81 = 54,243.63 : x
  2. Step 2: Convert to fraction form
    66,709.53/99,932.81 = 54,243.63/x
  3. Step 3: Cross multiply
    66,709.53x = 99,932.81 × 54,243.63
  4. Step 4: Simplify right side
    66,709.53x = 5,420,718,099.28
  5. Step 5: Solve for x
    x = 5,420,718,099.28/66,709.53
  6. Step 6: Final answer
    x = 81,258.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.