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Finding the Fourth Proportional to 66,941.40, 100,415.43 and 21,958.76

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Solution

The fourth proportional to 66,941.40, 100,415.43 and 21,958.76 is: 32,939.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,941.40 : 100,415.43 = 21,958.76 : x
  2. Step 2: Convert to fraction form
    66,941.40/100,415.43 = 21,958.76/x
  3. Step 3: Cross multiply
    66,941.40x = 100,415.43 × 21,958.76
  4. Step 4: Simplify right side
    66,941.40x = 2,204,997,825.59
  5. Step 5: Solve for x
    x = 2,204,997,825.59/66,941.40
  6. Step 6: Final answer
    x = 32,939.22

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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.