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Finding the Fourth Proportional to 212,489,978.42, 318,827,598.02 and 74,414,635.56

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Solution

The fourth proportional to 212,489,978.42, 318,827,598.02 and 74,414,635.56 is: 111,654,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,489,978.42 : 318,827,598.02 = 74,414,635.56 : x
  2. Step 2: Convert to fraction form
    212,489,978.42/318,827,598.02 = 74,414,635.56/x
  3. Step 3: Cross multiply
    212,489,978.42x = 318,827,598.02 × 74,414,635.56
  4. Step 4: Simplify right side
    212,489,978.42x = 23,725,439,512,756,404
  5. Step 5: Solve for x
    x = 23,725,439,512,756,404/212,489,978.42
  6. Step 6: Final answer
    x = 111,654,392.78

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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.