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Finding the Fourth Proportional to 66,943.40, 100,412.52 and 20,195

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Solution

The fourth proportional to 66,943.40, 100,412.52 and 20,195 is: 30,291.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,943.40 : 100,412.52 = 20,195 : x
  2. Step 2: Convert to fraction form
    66,943.40/100,412.52 = 20,195/x
  3. Step 3: Cross multiply
    66,943.40x = 100,412.52 × 20,195
  4. Step 4: Simplify right side
    66,943.40x = 2,027,830,841.40
  5. Step 5: Solve for x
    x = 2,027,830,841.40/66,943.40
  6. Step 6: Final answer
    x = 30,291.72

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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.