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Finding the Fourth Proportional to 157,807.08, 217,770.28 and 86,187.39

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Solution

The fourth proportional to 157,807.08, 217,770.28 and 86,187.39 is: 118,936.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,807.08 : 217,770.28 = 86,187.39 : x
  2. Step 2: Convert to fraction form
    157,807.08/217,770.28 = 86,187.39/x
  3. Step 3: Cross multiply
    157,807.08x = 217,770.28 × 86,187.39
  4. Step 4: Simplify right side
    157,807.08x = 18,769,052,052.77
  5. Step 5: Solve for x
    x = 18,769,052,052.77/157,807.08
  6. Step 6: Final answer
    x = 118,936.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.