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Finding the Fourth Proportional to 61,241.20, 91,861.80 and 19,124.88

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Solution

The fourth proportional to 61,241.20, 91,861.80 and 19,124.88 is: 28,687.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,241.20 : 91,861.80 = 19,124.88 : x
  2. Step 2: Convert to fraction form
    61,241.20/91,861.80 = 19,124.88/x
  3. Step 3: Cross multiply
    61,241.20x = 91,861.80 × 19,124.88
  4. Step 4: Simplify right side
    61,241.20x = 1,756,845,485.38
  5. Step 5: Solve for x
    x = 1,756,845,485.38/61,241.20
  6. Step 6: Final answer
    x = 28,687.31

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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.