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Finding the Fourth Proportional to 72,489.64, 100,080.56 and 48,324.64

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Solution

The fourth proportional to 72,489.64, 100,080.56 and 48,324.64 is: 66,717.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,489.64 : 100,080.56 = 48,324.64 : x
  2. Step 2: Convert to fraction form
    72,489.64/100,080.56 = 48,324.64/x
  3. Step 3: Cross multiply
    72,489.64x = 100,080.56 × 48,324.64
  4. Step 4: Simplify right side
    72,489.64x = 4,836,357,033.00
  5. Step 5: Solve for x
    x = 4,836,357,033.00/72,489.64
  6. Step 6: Final answer
    x = 66,717.91

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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.