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Finding the Fourth Proportional to 356,509.84, 534,759.06 and 86,640.16

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Solution

The fourth proportional to 356,509.84, 534,759.06 and 86,640.16 is: 129,958.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,509.84 : 534,759.06 = 86,640.16 : x
  2. Step 2: Convert to fraction form
    356,509.84/534,759.06 = 86,640.16/x
  3. Step 3: Cross multiply
    356,509.84x = 534,759.06 × 86,640.16
  4. Step 4: Simplify right side
    356,509.84x = 46,331,610,519.85
  5. Step 5: Solve for x
    x = 46,331,610,519.85/356,509.84
  6. Step 6: Final answer
    x = 129,958.85

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1.5x scale

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.