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Finding the Fourth Proportional to 248,278, 342,620.76 and 135,098.80

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Solution

The fourth proportional to 248,278, 342,620.76 and 135,098.80 is: 186,434.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,278 : 342,620.76 = 135,098.80 : x
  2. Step 2: Convert to fraction form
    248,278/342,620.76 = 135,098.80/x
  3. Step 3: Cross multiply
    248,278x = 342,620.76 × 135,098.80
  4. Step 4: Simplify right side
    248,278x = 46,287,653,531.09
  5. Step 5: Solve for x
    x = 46,287,653,531.09/248,278
  6. Step 6: Final answer
    x = 186,434.78

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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.