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Finding the Fourth Proportional to 251,142.70, 376,714.05 and 84,930.70

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Solution

The fourth proportional to 251,142.70, 376,714.05 and 84,930.70 is: 127,396.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,142.70 : 376,714.05 = 84,930.70 : x
  2. Step 2: Convert to fraction form
    251,142.70/376,714.05 = 84,930.70/x
  3. Step 3: Cross multiply
    251,142.70x = 376,714.05 × 84,930.70
  4. Step 4: Simplify right side
    251,142.70x = 31,994,587,966.34
  5. Step 5: Solve for x
    x = 31,994,587,966.34/251,142.70
  6. Step 6: Final answer
    x = 127,396.05

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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.