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Finding the Fourth Proportional to 53,621.92, 80,434.80 and 16,688.80

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Solution

The fourth proportional to 53,621.92, 80,434.80 and 16,688.80 is: 25,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,621.92 : 80,434.80 = 16,688.80 : x
  2. Step 2: Convert to fraction form
    53,621.92/80,434.80 = 16,688.80/x
  3. Step 3: Cross multiply
    53,621.92x = 80,434.80 × 16,688.80
  4. Step 4: Simplify right side
    53,621.92x = 1,342,360,290.24
  5. Step 5: Solve for x
    x = 1,342,360,290.24/53,621.92
  6. Step 6: Final answer
    x = 25,033.80

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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.