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Finding the Fourth Proportional to 172,578.69, 238,223.60 and 100,981.78

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Solution

The fourth proportional to 172,578.69, 238,223.60 and 100,981.78 is: 139,392.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,578.69 : 238,223.60 = 100,981.78 : x
  2. Step 2: Convert to fraction form
    172,578.69/238,223.60 = 100,981.78/x
  3. Step 3: Cross multiply
    172,578.69x = 238,223.60 × 100,981.78
  4. Step 4: Simplify right side
    172,578.69x = 24,056,243,166.01
  5. Step 5: Solve for x
    x = 24,056,243,166.01/172,578.69
  6. Step 6: Final answer
    x = 139,392.89

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1.5x scale

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.