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Finding the Fourth Proportional to 66,730.16, 100,066.08 and 19,972.10

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Solution

The fourth proportional to 66,730.16, 100,066.08 and 19,972.10 is: 29,949.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,730.16 : 100,066.08 = 19,972.10 : x
  2. Step 2: Convert to fraction form
    66,730.16/100,066.08 = 19,972.10/x
  3. Step 3: Cross multiply
    66,730.16x = 100,066.08 × 19,972.10
  4. Step 4: Simplify right side
    66,730.16x = 1,998,530,081.43
  5. Step 5: Solve for x
    x = 1,998,530,081.43/66,730.16
  6. Step 6: Final answer
    x = 29,949.43

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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.