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Finding the Fourth Proportional to 356,510.34, 534,759.81 and 86,640.66

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Solution

The fourth proportional to 356,510.34, 534,759.81 and 86,640.66 is: 129,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,510.34 : 534,759.81 = 86,640.66 : x
  2. Step 2: Convert to fraction form
    356,510.34/534,759.81 = 86,640.66/x
  3. Step 3: Cross multiply
    356,510.34x = 534,759.81 × 86,640.66
  4. Step 4: Simplify right side
    356,510.34x = 46,331,942,879.87
  5. Step 5: Solve for x
    x = 46,331,942,879.87/356,510.34
  6. Step 6: Final answer
    x = 129,959.60

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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.