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Finding the Fourth Proportional to 253,361.48, 349,643.27 and 138,650.30

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Solution

The fourth proportional to 253,361.48, 349,643.27 and 138,650.30 is: 191,339.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,361.48 : 349,643.27 = 138,650.30 : x
  2. Step 2: Convert to fraction form
    253,361.48/349,643.27 = 138,650.30/x
  3. Step 3: Cross multiply
    253,361.48x = 349,643.27 × 138,650.30
  4. Step 4: Simplify right side
    253,361.48x = 48,478,141,837.01
  5. Step 5: Solve for x
    x = 48,478,141,837.01/253,361.48
  6. Step 6: Final answer
    x = 191,339.83

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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.