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Finding the Fourth Proportional to 74,768.95, 112,120.61 and 27,989.02

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Solution

The fourth proportional to 74,768.95, 112,120.61 and 27,989.02 is: 41,971.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,768.95 : 112,120.61 = 27,989.02 : x
  2. Step 2: Convert to fraction form
    74,768.95/112,120.61 = 27,989.02/x
  3. Step 3: Cross multiply
    74,768.95x = 112,120.61 × 27,989.02
  4. Step 4: Simplify right side
    74,768.95x = 3,138,145,995.70
  5. Step 5: Solve for x
    x = 3,138,145,995.70/74,768.95
  6. Step 6: Final answer
    x = 41,971.25

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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.