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Finding the Fourth Proportional to 251,989.74, 347,745.78 and 138,812.46

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Solution

The fourth proportional to 251,989.74, 347,745.78 and 138,812.46 is: 191,561.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,989.74 : 347,745.78 = 138,812.46 : x
  2. Step 2: Convert to fraction form
    251,989.74/347,745.78 = 138,812.46/x
  3. Step 3: Cross multiply
    251,989.74x = 347,745.78 × 138,812.46
  4. Step 4: Simplify right side
    251,989.74x = 48,271,447,176.42
  5. Step 5: Solve for x
    x = 48,271,447,176.42/251,989.74
  6. Step 6: Final answer
    x = 191,561.16

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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.