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Finding the Fourth Proportional to 248,687.90, 343,189.73 and 135,510.65

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Solution

The fourth proportional to 248,687.90, 343,189.73 and 135,510.65 is: 187,004.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,687.90 : 343,189.73 = 135,510.65 : x
  2. Step 2: Convert to fraction form
    248,687.90/343,189.73 = 135,510.65/x
  3. Step 3: Cross multiply
    248,687.90x = 343,189.73 × 135,510.65
  4. Step 4: Simplify right side
    248,687.90x = 46,505,862,008.45
  5. Step 5: Solve for x
    x = 46,505,862,008.45/248,687.90
  6. Step 6: Final answer
    x = 187,004.93

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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.