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Finding the Fourth Proportional to 251,909.12, 347,633.07 and 138,731.06

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Solution

The fourth proportional to 251,909.12, 347,633.07 and 138,731.06 is: 191,448.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,909.12 : 347,633.07 = 138,731.06 : x
  2. Step 2: Convert to fraction form
    251,909.12/347,633.07 = 138,731.06/x
  3. Step 3: Cross multiply
    251,909.12x = 347,633.07 × 138,731.06
  4. Step 4: Simplify right side
    251,909.12x = 48,227,504,641.00
  5. Step 5: Solve for x
    x = 48,227,504,641.00/251,909.12
  6. Step 6: Final answer
    x = 191,448.03

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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.