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Finding the Fourth Proportional to 289,611.70, 434,071.95 and 121,131.70

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Solution

The fourth proportional to 289,611.70, 434,071.95 and 121,131.70 is: 181,553.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,611.70 : 434,071.95 = 121,131.70 : x
  2. Step 2: Convert to fraction form
    289,611.70/434,071.95 = 121,131.70/x
  3. Step 3: Cross multiply
    289,611.70x = 434,071.95 × 121,131.70
  4. Step 4: Simplify right side
    289,611.70x = 52,579,873,225.82
  5. Step 5: Solve for x
    x = 52,579,873,225.82/289,611.70
  6. Step 6: Final answer
    x = 181,553.00

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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.