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Finding the Fourth Proportional to 66,718.40, 100,231.20 and 64,107.20

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Solution

The fourth proportional to 66,718.40, 100,231.20 and 64,107.20 is: 96,308.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,718.40 : 100,231.20 = 64,107.20 : x
  2. Step 2: Convert to fraction form
    66,718.40/100,231.20 = 64,107.20/x
  3. Step 3: Cross multiply
    66,718.40x = 100,231.20 × 64,107.20
  4. Step 4: Simplify right side
    66,718.40x = 6,425,541,584.64
  5. Step 5: Solve for x
    x = 6,425,541,584.64/66,718.40
  6. Step 6: Final answer
    x = 96,308.39

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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.