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Finding the Fourth Proportional to 111,917.70, 167,876.55 and 38,045.70

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Solution

The fourth proportional to 111,917.70, 167,876.55 and 38,045.70 is: 57,068.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,917.70 : 167,876.55 = 38,045.70 : x
  2. Step 2: Convert to fraction form
    111,917.70/167,876.55 = 38,045.70/x
  3. Step 3: Cross multiply
    111,917.70x = 167,876.55 × 38,045.70
  4. Step 4: Simplify right side
    111,917.70x = 6,386,980,858.34
  5. Step 5: Solve for x
    x = 6,386,980,858.34/111,917.70
  6. Step 6: Final answer
    x = 57,068.55

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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.