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Finding the Fourth Proportional to 248,718.72, 343,221.84 and 135,539.04

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Solution

The fourth proportional to 248,718.72, 343,221.84 and 135,539.04 is: 187,038.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,718.72 : 343,221.84 = 135,539.04 : x
  2. Step 2: Convert to fraction form
    248,718.72/343,221.84 = 135,539.04/x
  3. Step 3: Cross multiply
    248,718.72x = 343,221.84 × 135,539.04
  4. Step 4: Simplify right side
    248,718.72x = 46,519,958,700.63
  5. Step 5: Solve for x
    x = 46,519,958,700.63/248,718.72
  6. Step 6: Final answer
    x = 187,038.43

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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.