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Finding the Fourth Proportional to 62,991.49, 94,487.09 and 20,871.70

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Solution

The fourth proportional to 62,991.49, 94,487.09 and 20,871.70 is: 31,307.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,991.49 : 94,487.09 = 20,871.70 : x
  2. Step 2: Convert to fraction form
    62,991.49/94,487.09 = 20,871.70/x
  3. Step 3: Cross multiply
    62,991.49x = 94,487.09 × 20,871.70
  4. Step 4: Simplify right side
    62,991.49x = 1,972,106,196.35
  5. Step 5: Solve for x
    x = 1,972,106,196.35/62,991.49
  6. Step 6: Final answer
    x = 31,307.50

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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.