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Finding the Fourth Proportional to 251,728, 377,592 and 103,987.84

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Solution

The fourth proportional to 251,728, 377,592 and 103,987.84 is: 155,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,728 : 377,592 = 103,987.84 : x
  2. Step 2: Convert to fraction form
    251,728/377,592 = 103,987.84/x
  3. Step 3: Cross multiply
    251,728x = 377,592 × 103,987.84
  4. Step 4: Simplify right side
    251,728x = 39,264,976,481.28
  5. Step 5: Solve for x
    x = 39,264,976,481.28/251,728
  6. Step 6: Final answer
    x = 155,981.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.