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Finding the Fourth Proportional to 55,971.90, 83,959.29 and 18,531.90

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Solution

The fourth proportional to 55,971.90, 83,959.29 and 18,531.90 is: 27,798.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,971.90 : 83,959.29 = 18,531.90 : x
  2. Step 2: Convert to fraction form
    55,971.90/83,959.29 = 18,531.90/x
  3. Step 3: Cross multiply
    55,971.90x = 83,959.29 × 18,531.90
  4. Step 4: Simplify right side
    55,971.90x = 1,555,925,166.35
  5. Step 5: Solve for x
    x = 1,555,925,166.35/55,971.90
  6. Step 6: Final answer
    x = 27,798.33

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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.