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Finding the Fourth Proportional to 251,640.50, 347,266.32 and 138,465.68

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Solution

The fourth proportional to 251,640.50, 347,266.32 and 138,465.68 is: 191,083.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,640.50 : 347,266.32 = 138,465.68 : x
  2. Step 2: Convert to fraction form
    251,640.50/347,266.32 = 138,465.68/x
  3. Step 3: Cross multiply
    251,640.50x = 347,266.32 × 138,465.68
  4. Step 4: Simplify right side
    251,640.50x = 48,084,467,139.90
  5. Step 5: Solve for x
    x = 48,084,467,139.90/251,640.50
  6. Step 6: Final answer
    x = 191,083.98

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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.