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Finding the Fourth Proportional to 251,142.20, 376,713.30 and 84,930.20

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Solution

The fourth proportional to 251,142.20, 376,713.30 and 84,930.20 is: 127,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,142.20 : 376,713.30 = 84,930.20 : x
  2. Step 2: Convert to fraction form
    251,142.20/376,713.30 = 84,930.20/x
  3. Step 3: Cross multiply
    251,142.20x = 376,713.30 × 84,930.20
  4. Step 4: Simplify right side
    251,142.20x = 31,994,335,911.66
  5. Step 5: Solve for x
    x = 31,994,335,911.66/251,142.20
  6. Step 6: Final answer
    x = 127,395.30

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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.