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Finding the Fourth Proportional to 228,805.50, 315,751.68 and 139,381.50

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Solution

The fourth proportional to 228,805.50, 315,751.68 and 139,381.50 is: 192,346.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,805.50 : 315,751.68 = 139,381.50 : x
  2. Step 2: Convert to fraction form
    228,805.50/315,751.68 = 139,381.50/x
  3. Step 3: Cross multiply
    228,805.50x = 315,751.68 × 139,381.50
  4. Step 4: Simplify right side
    228,805.50x = 44,009,942,785.92
  5. Step 5: Solve for x
    x = 44,009,942,785.92/228,805.50
  6. Step 6: Final answer
    x = 192,346.52

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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.