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Finding the Fourth Proportional to 356,611.11, 534,949.77 and 128,963.70

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Solution

The fourth proportional to 356,611.11, 534,949.77 and 128,963.70 is: 193,457.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,611.11 : 534,949.77 = 128,963.70 : x
  2. Step 2: Convert to fraction form
    356,611.11/534,949.77 = 128,963.70/x
  3. Step 3: Cross multiply
    356,611.11x = 534,949.77 × 128,963.70
  4. Step 4: Simplify right side
    356,611.11x = 68,989,101,653.35
  5. Step 5: Solve for x
    x = 68,989,101,653.35/356,611.11
  6. Step 6: Final answer
    x = 193,457.52

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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.