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Finding the Fourth Proportional to 117,678, 162,487.28 and 72,377.03

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Solution

The fourth proportional to 117,678, 162,487.28 and 72,377.03 is: 99,936.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,678 : 162,487.28 = 72,377.03 : x
  2. Step 2: Convert to fraction form
    117,678/162,487.28 = 72,377.03/x
  3. Step 3: Cross multiply
    117,678x = 162,487.28 × 72,377.03
  4. Step 4: Simplify right side
    117,678x = 11,760,346,739.18
  5. Step 5: Solve for x
    x = 11,760,346,739.18/117,678
  6. Step 6: Final answer
    x = 99,936.66

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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.