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Finding the Fourth Proportional to 43,508.43, 59,978.16 and 30,721.77

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Solution

The fourth proportional to 43,508.43, 59,978.16 and 30,721.77 is: 42,351.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,508.43 : 59,978.16 = 30,721.77 : x
  2. Step 2: Convert to fraction form
    43,508.43/59,978.16 = 30,721.77/x
  3. Step 3: Cross multiply
    43,508.43x = 59,978.16 × 30,721.77
  4. Step 4: Simplify right side
    43,508.43x = 1,842,635,236.54
  5. Step 5: Solve for x
    x = 1,842,635,236.54/43,508.43
  6. Step 6: Final answer
    x = 42,351.22

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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.