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Finding the Fourth Proportional to 74,143.95, 111,721.87 and 61,284.39

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Solution

The fourth proportional to 74,143.95, 111,721.87 and 61,284.39 is: 92,344.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,143.95 : 111,721.87 = 61,284.39 : x
  2. Step 2: Convert to fraction form
    74,143.95/111,721.87 = 61,284.39/x
  3. Step 3: Cross multiply
    74,143.95x = 111,721.87 × 61,284.39
  4. Step 4: Simplify right side
    74,143.95x = 6,846,806,094.00
  5. Step 5: Solve for x
    x = 6,846,806,094.00/74,143.95
  6. Step 6: Final answer
    x = 92,344.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.