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Finding the Fourth Proportional to 228,950.50, 315,951.69 and 128,348.50

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Solution

The fourth proportional to 228,950.50, 315,951.69 and 128,348.50 is: 177,120.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,950.50 : 315,951.69 = 128,348.50 : x
  2. Step 2: Convert to fraction form
    228,950.50/315,951.69 = 128,348.50/x
  3. Step 3: Cross multiply
    228,950.50x = 315,951.69 × 128,348.50
  4. Step 4: Simplify right side
    228,950.50x = 40,551,925,483.97
  5. Step 5: Solve for x
    x = 40,551,925,483.97/228,950.50
  6. Step 6: Final answer
    x = 177,120.93

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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.