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Finding the Fourth Proportional to 61,170.78, 84,422.07 and 34,320.54

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Solution

The fourth proportional to 61,170.78, 84,422.07 and 34,320.54 is: 47,365.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,170.78 : 84,422.07 = 34,320.54 : x
  2. Step 2: Convert to fraction form
    61,170.78/84,422.07 = 34,320.54/x
  3. Step 3: Cross multiply
    61,170.78x = 84,422.07 × 34,320.54
  4. Step 4: Simplify right side
    61,170.78x = 2,897,411,030.32
  5. Step 5: Solve for x
    x = 2,897,411,030.32/61,170.78
  6. Step 6: Final answer
    x = 47,365.93

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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.