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Finding the Fourth Proportional to 66,981,800.52, 100,479,651.72 and 18,459,662.52

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Solution

The fourth proportional to 66,981,800.52, 100,479,651.72 and 18,459,662.52 is: 27,691,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,981,800.52 : 100,479,651.72 = 18,459,662.52 : x
  2. Step 2: Convert to fraction form
    66,981,800.52/100,479,651.72 = 18,459,662.52/x
  3. Step 3: Cross multiply
    66,981,800.52x = 100,479,651.72 × 18,459,662.52
  4. Step 4: Simplify right side
    66,981,800.52x = 1,854,820,460,878,337.50
  5. Step 5: Solve for x
    x = 1,854,820,460,878,337.50/66,981,800.52
  6. Step 6: Final answer
    x = 27,691,409.40

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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.