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Finding the Fourth Proportional to 334,138.80, 501,208.20 and 84,820.80

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Solution

The fourth proportional to 334,138.80, 501,208.20 and 84,820.80 is: 127,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    334,138.80 : 501,208.20 = 84,820.80 : x
  2. Step 2: Convert to fraction form
    334,138.80/501,208.20 = 84,820.80/x
  3. Step 3: Cross multiply
    334,138.80x = 501,208.20 × 84,820.80
  4. Step 4: Simplify right side
    334,138.80x = 42,512,880,490.56
  5. Step 5: Solve for x
    x = 42,512,880,490.56/334,138.80
  6. Step 6: Final answer
    x = 127,231.20

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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.