Home / 318,889,789.86-440,067,915.54-172,212,073.86

Finding the Fourth Proportional to 318,889,789.86, 440,067,915.54 and 172,212,073.86

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Solution

The fourth proportional to 318,889,789.86, 440,067,915.54 and 172,212,073.86 is: 237,652,664.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,889,789.86 : 440,067,915.54 = 172,212,073.86 : x
  2. Step 2: Convert to fraction form
    318,889,789.86/440,067,915.54 = 172,212,073.86/x
  3. Step 3: Cross multiply
    318,889,789.86x = 440,067,915.54 × 172,212,073.86
  4. Step 4: Simplify right side
    318,889,789.86x = 75,785,008,374,390,736
  5. Step 5: Solve for x
    x = 75,785,008,374,390,736/318,889,789.86
  6. Step 6: Final answer
    x = 237,652,664.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.