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Finding the Fourth Proportional to 253,058.48, 349,220.78 and 138,337.63

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Solution

The fourth proportional to 253,058.48, 349,220.78 and 138,337.63 is: 190,905.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,058.48 : 349,220.78 = 138,337.63 : x
  2. Step 2: Convert to fraction form
    253,058.48/349,220.78 = 138,337.63/x
  3. Step 3: Cross multiply
    253,058.48x = 349,220.78 × 138,337.63
  4. Step 4: Simplify right side
    253,058.48x = 48,310,375,051.95
  5. Step 5: Solve for x
    x = 48,310,375,051.95/253,058.48
  6. Step 6: Final answer
    x = 190,905.97

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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.