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Finding the Fourth Proportional to 251,661.59, 347,278.56 and 138,484.34

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Solution

The fourth proportional to 251,661.59, 347,278.56 and 138,484.34 is: 191,100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,661.59 : 347,278.56 = 138,484.34 : x
  2. Step 2: Convert to fraction form
    251,661.59/347,278.56 = 138,484.34/x
  3. Step 3: Cross multiply
    251,661.59x = 347,278.56 × 138,484.34
  4. Step 4: Simplify right side
    251,661.59x = 48,092,642,177.75
  5. Step 5: Solve for x
    x = 48,092,642,177.75/251,661.59
  6. Step 6: Final answer
    x = 191,100.45

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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.