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Finding the Fourth Proportional to 335,975.50, 503,972.97 and 86,657.50

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Solution

The fourth proportional to 335,975.50, 503,972.97 and 86,657.50 is: 129,988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,975.50 : 503,972.97 = 86,657.50 : x
  2. Step 2: Convert to fraction form
    335,975.50/503,972.97 = 86,657.50/x
  3. Step 3: Cross multiply
    335,975.50x = 503,972.97 × 86,657.50
  4. Step 4: Simplify right side
    335,975.50x = 43,673,037,647.78
  5. Step 5: Solve for x
    x = 43,673,037,647.78/335,975.50
  6. Step 6: Final answer
    x = 129,988.76

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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.