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Finding the Fourth Proportional to 248,690.78, 343,193.70 and 135,513.52

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Solution

The fourth proportional to 248,690.78, 343,193.70 and 135,513.52 is: 187,008.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,690.78 : 343,193.70 = 135,513.52 : x
  2. Step 2: Convert to fraction form
    248,690.78/343,193.70 = 135,513.52/x
  3. Step 3: Cross multiply
    248,690.78x = 343,193.70 × 135,513.52
  4. Step 4: Simplify right side
    248,690.78x = 46,507,386,328.82
  5. Step 5: Solve for x
    x = 46,507,386,328.82/248,690.78
  6. Step 6: Final answer
    x = 187,008.89

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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.