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Finding the Fourth Proportional to 251,603.50, 347,220.12 and 138,433.54

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Solution

The fourth proportional to 251,603.50, 347,220.12 and 138,433.54 is: 191,042.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,603.50 : 347,220.12 = 138,433.54 : x
  2. Step 2: Convert to fraction form
    251,603.50/347,220.12 = 138,433.54/x
  3. Step 3: Cross multiply
    251,603.50x = 347,220.12 × 138,433.54
  4. Step 4: Simplify right side
    251,603.50x = 48,066,910,370.82
  5. Step 5: Solve for x
    x = 48,066,910,370.82/251,603.50
  6. Step 6: Final answer
    x = 191,042.30

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1.5x scale

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.