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Finding the Fourth Proportional to 106,561.71, 159,759.95 and 69,042.51

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Solution

The fourth proportional to 106,561.71, 159,759.95 and 69,042.51 is: 103,510.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,561.71 : 159,759.95 = 69,042.51 : x
  2. Step 2: Convert to fraction form
    106,561.71/159,759.95 = 69,042.51/x
  3. Step 3: Cross multiply
    106,561.71x = 159,759.95 × 69,042.51
  4. Step 4: Simplify right side
    106,561.71x = 11,030,227,600.26
  5. Step 5: Solve for x
    x = 11,030,227,600.26/106,561.71
  6. Step 6: Final answer
    x = 103,510.23

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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.