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Finding the Fourth Proportional to 358,731.70, 538,097.55 and 109,381.30

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Solution

The fourth proportional to 358,731.70, 538,097.55 and 109,381.30 is: 164,071.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,731.70 : 538,097.55 = 109,381.30 : x
  2. Step 2: Convert to fraction form
    358,731.70/538,097.55 = 109,381.30/x
  3. Step 3: Cross multiply
    358,731.70x = 538,097.55 × 109,381.30
  4. Step 4: Simplify right side
    358,731.70x = 58,857,809,545.82
  5. Step 5: Solve for x
    x = 58,857,809,545.82/358,731.70
  6. Step 6: Final answer
    x = 164,071.95

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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.