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Finding the Fourth Proportional to 248,728.50, 343,247.76 and 135,553.68

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Solution

The fourth proportional to 248,728.50, 343,247.76 and 135,553.68 is: 187,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,728.50 : 343,247.76 = 135,553.68 : x
  2. Step 2: Convert to fraction form
    248,728.50/343,247.76 = 135,553.68/x
  3. Step 3: Cross multiply
    248,728.50x = 343,247.76 × 135,553.68
  4. Step 4: Simplify right side
    248,728.50x = 46,528,497,019.76
  5. Step 5: Solve for x
    x = 46,528,497,019.76/248,728.50
  6. Step 6: Final answer
    x = 187,065.40

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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.