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Finding the Fourth Proportional to 92,908.78, 128,267.31 and 61,169.95

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Solution

The fourth proportional to 92,908.78, 128,267.31 and 61,169.95 is: 84,449.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.78 : 128,267.31 = 61,169.95 : x
  2. Step 2: Convert to fraction form
    92,908.78/128,267.31 = 61,169.95/x
  3. Step 3: Cross multiply
    92,908.78x = 128,267.31 × 61,169.95
  4. Step 4: Simplify right side
    92,908.78x = 7,846,104,939.33
  5. Step 5: Solve for x
    x = 7,846,104,939.33/92,908.78
  6. Step 6: Final answer
    x = 84,449.55

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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.