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Finding the Fourth Proportional to 228,697.88, 315,603.07 and 139,273.88

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Solution

The fourth proportional to 228,697.88, 315,603.07 and 139,273.88 is: 192,197.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,697.88 : 315,603.07 = 139,273.88 : x
  2. Step 2: Convert to fraction form
    228,697.88/315,603.07 = 139,273.88/x
  3. Step 3: Cross multiply
    228,697.88x = 315,603.07 × 139,273.88
  4. Step 4: Simplify right side
    228,697.88x = 43,955,262,172.61
  5. Step 5: Solve for x
    x = 43,955,262,172.61/228,697.88
  6. Step 6: Final answer
    x = 192,197.95

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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.