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Finding the Fourth Proportional to 253,259.78, 349,486.94 and 138,536.78

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Solution

The fourth proportional to 253,259.78, 349,486.94 and 138,536.78 is: 191,174.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,259.78 : 349,486.94 = 138,536.78 : x
  2. Step 2: Convert to fraction form
    253,259.78/349,486.94 = 138,536.78/x
  3. Step 3: Cross multiply
    253,259.78x = 349,486.94 × 138,536.78
  4. Step 4: Simplify right side
    253,259.78x = 48,416,794,626.97
  5. Step 5: Solve for x
    x = 48,416,794,626.97/253,259.78
  6. Step 6: Final answer
    x = 191,174.43

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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.