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Finding the Fourth Proportional to 153,696.50, 212,101.17 and 83,040.50

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Solution

The fourth proportional to 153,696.50, 212,101.17 and 83,040.50 is: 114,595.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,696.50 : 212,101.17 = 83,040.50 : x
  2. Step 2: Convert to fraction form
    153,696.50/212,101.17 = 83,040.50/x
  3. Step 3: Cross multiply
    153,696.50x = 212,101.17 × 83,040.50
  4. Step 4: Simplify right side
    153,696.50x = 17,612,987,207.39
  5. Step 5: Solve for x
    x = 17,612,987,207.39/153,696.50
  6. Step 6: Final answer
    x = 114,595.89

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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.