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Finding the Fourth Proportional to 66,691.68, 100,022.64 and 19,938.48

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Solution

The fourth proportional to 66,691.68, 100,022.64 and 19,938.48 is: 29,903.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,691.68 : 100,022.64 = 19,938.48 : x
  2. Step 2: Convert to fraction form
    66,691.68/100,022.64 = 19,938.48/x
  3. Step 3: Cross multiply
    66,691.68x = 100,022.64 × 19,938.48
  4. Step 4: Simplify right side
    66,691.68x = 1,994,299,407.19
  5. Step 5: Solve for x
    x = 1,994,299,407.19/66,691.68
  6. Step 6: Final answer
    x = 29,903.27

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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.