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Finding the Fourth Proportional to 53,889.50, 80,840.03 and 20,637.99

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Solution

The fourth proportional to 53,889.50, 80,840.03 and 20,637.99 is: 30,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,889.50 : 80,840.03 = 20,637.99 : x
  2. Step 2: Convert to fraction form
    53,889.50/80,840.03 = 20,637.99/x
  3. Step 3: Cross multiply
    53,889.50x = 80,840.03 × 20,637.99
  4. Step 4: Simplify right side
    53,889.50x = 1,668,375,627.55
  5. Step 5: Solve for x
    x = 1,668,375,627.55/53,889.50
  6. Step 6: Final answer
    x = 30,959.20

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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.