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Finding the Fourth Proportional to 66,970.40, 100,512.30 and 27,555.80

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Solution

The fourth proportional to 66,970.40, 100,512.30 and 27,555.80 is: 41,357.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,970.40 : 100,512.30 = 27,555.80 : x
  2. Step 2: Convert to fraction form
    66,970.40/100,512.30 = 27,555.80/x
  3. Step 3: Cross multiply
    66,970.40x = 100,512.30 × 27,555.80
  4. Step 4: Simplify right side
    66,970.40x = 2,769,696,836.34
  5. Step 5: Solve for x
    x = 2,769,696,836.34/66,970.40
  6. Step 6: Final answer
    x = 41,357.03

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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.