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Finding the Fourth Proportional to 66,966.74, 100,405.05 and 35,343.33

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Solution

The fourth proportional to 66,966.74, 100,405.05 and 35,343.33 is: 52,991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,966.74 : 100,405.05 = 35,343.33 : x
  2. Step 2: Convert to fraction form
    66,966.74/100,405.05 = 35,343.33/x
  3. Step 3: Cross multiply
    66,966.74x = 100,405.05 × 35,343.33
  4. Step 4: Simplify right side
    66,966.74x = 3,548,648,815.82
  5. Step 5: Solve for x
    x = 3,548,648,815.82/66,966.74
  6. Step 6: Final answer
    x = 52,991.21

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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.