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Finding the Fourth Proportional to 66,780.64, 100,187.16 and 20,033.52

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Solution

The fourth proportional to 66,780.64, 100,187.16 and 20,033.52 is: 30,055.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,780.64 : 100,187.16 = 20,033.52 : x
  2. Step 2: Convert to fraction form
    66,780.64/100,187.16 = 20,033.52/x
  3. Step 3: Cross multiply
    66,780.64x = 100,187.16 × 20,033.52
  4. Step 4: Simplify right side
    66,780.64x = 2,007,100,972.67
  5. Step 5: Solve for x
    x = 2,007,100,972.67/66,780.64
  6. Step 6: Final answer
    x = 30,055.13

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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.