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Finding the Fourth Proportional to 111,411.89, 153,738.76 and 65,466.66

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Solution

The fourth proportional to 111,411.89, 153,738.76 and 65,466.66 is: 90,338.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,411.89 : 153,738.76 = 65,466.66 : x
  2. Step 2: Convert to fraction form
    111,411.89/153,738.76 = 65,466.66/x
  3. Step 3: Cross multiply
    111,411.89x = 153,738.76 × 65,466.66
  4. Step 4: Simplify right side
    111,411.89x = 10,064,763,665.35
  5. Step 5: Solve for x
    x = 10,064,763,665.35/111,411.89
  6. Step 6: Final answer
    x = 90,338.33

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Double scale
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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.