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Finding the Fourth Proportional to 74,846.40, 111,721.60 and 65,989.28

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Solution

The fourth proportional to 74,846.40, 111,721.60 and 65,989.28 is: 98,500.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,846.40 : 111,721.60 = 65,989.28 : x
  2. Step 2: Convert to fraction form
    74,846.40/111,721.60 = 65,989.28/x
  3. Step 3: Cross multiply
    74,846.40x = 111,721.60 × 65,989.28
  4. Step 4: Simplify right side
    74,846.40x = 7,372,427,944.45
  5. Step 5: Solve for x
    x = 7,372,427,944.45/74,846.40
  6. Step 6: Final answer
    x = 98,500.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.