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Finding the Fourth Proportional to 211,166.40, 316,716.59 and 69,010.54

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Solution

The fourth proportional to 211,166.40, 316,716.59 and 69,010.54 is: 103,505.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,166.40 : 316,716.59 = 69,010.54 : x
  2. Step 2: Convert to fraction form
    211,166.40/316,716.59 = 69,010.54/x
  3. Step 3: Cross multiply
    211,166.40x = 316,716.59 × 69,010.54
  4. Step 4: Simplify right side
    211,166.40x = 21,856,782,557.81
  5. Step 5: Solve for x
    x = 21,856,782,557.81/211,166.40
  6. Step 6: Final answer
    x = 103,505.02

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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.