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Finding the Fourth Proportional to 66,956.55, 100,419.26 and 19,561.12

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Solution

The fourth proportional to 66,956.55, 100,419.26 and 19,561.12 is: 29,337.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,956.55 : 100,419.26 = 19,561.12 : x
  2. Step 2: Convert to fraction form
    66,956.55/100,419.26 = 19,561.12/x
  3. Step 3: Cross multiply
    66,956.55x = 100,419.26 × 19,561.12
  4. Step 4: Simplify right side
    66,956.55x = 1,964,313,195.17
  5. Step 5: Solve for x
    x = 1,964,313,195.17/66,956.55
  6. Step 6: Final answer
    x = 29,337.13

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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.