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Finding the Fourth Proportional to 69,321.56, 103,981.42 and 16,730.80

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Solution

The fourth proportional to 69,321.56, 103,981.42 and 16,730.80 is: 25,095.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,321.56 : 103,981.42 = 16,730.80 : x
  2. Step 2: Convert to fraction form
    69,321.56/103,981.42 = 16,730.80/x
  3. Step 3: Cross multiply
    69,321.56x = 103,981.42 × 16,730.80
  4. Step 4: Simplify right side
    69,321.56x = 1,739,692,341.74
  5. Step 5: Solve for x
    x = 1,739,692,341.74/69,321.56
  6. Step 6: Final answer
    x = 25,095.98

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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.