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Finding the Fourth Proportional to 55,791.78, 76,994.43 and 30,641.28

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Solution

The fourth proportional to 55,791.78, 76,994.43 and 30,641.28 is: 42,285.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,791.78 : 76,994.43 = 30,641.28 : x
  2. Step 2: Convert to fraction form
    55,791.78/76,994.43 = 30,641.28/x
  3. Step 3: Cross multiply
    55,791.78x = 76,994.43 × 30,641.28
  4. Step 4: Simplify right side
    55,791.78x = 2,359,207,888.07
  5. Step 5: Solve for x
    x = 2,359,207,888.07/55,791.78
  6. Step 6: Final answer
    x = 42,285.94

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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.