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Finding the Fourth Proportional to 54,296.61, 81,424.95 and 18,748.92

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Solution

The fourth proportional to 54,296.61, 81,424.95 and 18,748.92 is: 28,116.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,296.61 : 81,424.95 = 18,748.92 : x
  2. Step 2: Convert to fraction form
    54,296.61/81,424.95 = 18,748.92/x
  3. Step 3: Cross multiply
    54,296.61x = 81,424.95 × 18,748.92
  4. Step 4: Simplify right side
    54,296.61x = 1,526,629,873.55
  5. Step 5: Solve for x
    x = 1,526,629,873.55/54,296.61
  6. Step 6: Final answer
    x = 28,116.49

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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.