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Finding the Fourth Proportional to 248,742.43, 343,248.13 and 139,863.54

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Solution

The fourth proportional to 248,742.43, 343,248.13 and 139,863.54 is: 193,002.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,742.43 : 343,248.13 = 139,863.54 : x
  2. Step 2: Convert to fraction form
    248,742.43/343,248.13 = 139,863.54/x
  3. Step 3: Cross multiply
    248,742.43x = 343,248.13 × 139,863.54
  4. Step 4: Simplify right side
    248,742.43x = 48,007,898,560.18
  5. Step 5: Solve for x
    x = 48,007,898,560.18/248,742.43
  6. Step 6: Final answer
    x = 193,002.45

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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.