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Finding the Fourth Proportional to 235,905.69, 353,543.27 and 86,005.17

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Solution

The fourth proportional to 235,905.69, 353,543.27 and 86,005.17 is: 128,892.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,905.69 : 353,543.27 = 86,005.17 : x
  2. Step 2: Convert to fraction form
    235,905.69/353,543.27 = 86,005.17/x
  3. Step 3: Cross multiply
    235,905.69x = 353,543.27 × 86,005.17
  4. Step 4: Simplify right side
    235,905.69x = 30,406,548,608.68
  5. Step 5: Solve for x
    x = 30,406,548,608.68/235,905.69
  6. Step 6: Final answer
    x = 128,892.82

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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.