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Finding the Fourth Proportional to 253,539.90, 349,871.75 and 138,796.56

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Solution

The fourth proportional to 253,539.90, 349,871.75 and 138,796.56 is: 191,531.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,539.90 : 349,871.75 = 138,796.56 : x
  2. Step 2: Convert to fraction form
    253,539.90/349,871.75 = 138,796.56/x
  3. Step 3: Cross multiply
    253,539.90x = 349,871.75 × 138,796.56
  4. Step 4: Simplify right side
    253,539.90x = 48,560,994,293.00
  5. Step 5: Solve for x
    x = 48,560,994,293.00/253,539.90
  6. Step 6: Final answer
    x = 191,531.96

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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.