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Finding the Fourth Proportional to 228,262.90, 342,113.92 and 128,212.78

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Solution

The fourth proportional to 228,262.90, 342,113.92 and 128,212.78 is: 192,161.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,262.90 : 342,113.92 = 128,212.78 : x
  2. Step 2: Convert to fraction form
    228,262.90/342,113.92 = 128,212.78/x
  3. Step 3: Cross multiply
    228,262.90x = 342,113.92 × 128,212.78
  4. Step 4: Simplify right side
    228,262.90x = 43,863,376,759.90
  5. Step 5: Solve for x
    x = 43,863,376,759.90/228,262.90
  6. Step 6: Final answer
    x = 192,161.66

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1.5x scale

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.