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Finding the Fourth Proportional to 251,700.36, 347,346.30 and 138,523.20

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Solution

The fourth proportional to 251,700.36, 347,346.30 and 138,523.20 is: 191,161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,700.36 : 347,346.30 = 138,523.20 : x
  2. Step 2: Convert to fraction form
    251,700.36/347,346.30 = 138,523.20/x
  3. Step 3: Cross multiply
    251,700.36x = 347,346.30 × 138,523.20
  4. Step 4: Simplify right side
    251,700.36x = 48,115,520,984.16
  5. Step 5: Solve for x
    x = 48,115,520,984.16/251,700.36
  6. Step 6: Final answer
    x = 191,161.91

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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.