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Finding the Fourth Proportional to 333,993.61, 500,991.45 and 81,274.15

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Solution

The fourth proportional to 333,993.61, 500,991.45 and 81,274.15 is: 121,911.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,993.61 : 500,991.45 = 81,274.15 : x
  2. Step 2: Convert to fraction form
    333,993.61/500,991.45 = 81,274.15/x
  3. Step 3: Cross multiply
    333,993.61x = 500,991.45 × 81,274.15
  4. Step 4: Simplify right side
    333,993.61x = 40,717,654,577.48
  5. Step 5: Solve for x
    x = 40,717,654,577.48/333,993.61
  6. Step 6: Final answer
    x = 121,911.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.