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Finding the Fourth Proportional to 55,608, 76,739.04 and 30,458.40

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Solution

The fourth proportional to 55,608, 76,739.04 and 30,458.40 is: 42,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,608 : 76,739.04 = 30,458.40 : x
  2. Step 2: Convert to fraction form
    55,608/76,739.04 = 30,458.40/x
  3. Step 3: Cross multiply
    55,608x = 76,739.04 × 30,458.40
  4. Step 4: Simplify right side
    55,608x = 2,337,348,375.94
  5. Step 5: Solve for x
    x = 2,337,348,375.94/55,608
  6. Step 6: Final answer
    x = 42,032.59

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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.