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Finding the Fourth Proportional to 251,940, 347,677.20 and 138,762.75

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Solution

The fourth proportional to 251,940, 347,677.20 and 138,762.75 is: 191,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,940 : 347,677.20 = 138,762.75 : x
  2. Step 2: Convert to fraction form
    251,940/347,677.20 = 138,762.75/x
  3. Step 3: Cross multiply
    251,940x = 347,677.20 × 138,762.75
  4. Step 4: Simplify right side
    251,940x = 48,244,644,384.30
  5. Step 5: Solve for x
    x = 48,244,644,384.30/251,940
  6. Step 6: Final answer
    x = 191,492.60

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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.