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Finding the Fourth Proportional to 93,161.47, 128,562.84 and 50,720

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Solution

The fourth proportional to 93,161.47, 128,562.84 and 50,720 is: 69,993.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,161.47 : 128,562.84 = 50,720 : x
  2. Step 2: Convert to fraction form
    93,161.47/128,562.84 = 50,720/x
  3. Step 3: Cross multiply
    93,161.47x = 128,562.84 × 50,720
  4. Step 4: Simplify right side
    93,161.47x = 6,520,707,244.80
  5. Step 5: Solve for x
    x = 6,520,707,244.80/93,161.47
  6. Step 6: Final answer
    x = 69,993.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.