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Finding the Fourth Proportional to 101,301, 139,704.39 and 84,361.20

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Solution

The fourth proportional to 101,301, 139,704.39 and 84,361.20 is: 116,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,301 : 139,704.39 = 84,361.20 : x
  2. Step 2: Convert to fraction form
    101,301/139,704.39 = 84,361.20/x
  3. Step 3: Cross multiply
    101,301x = 139,704.39 × 84,361.20
  4. Step 4: Simplify right side
    101,301x = 11,785,629,985.67
  5. Step 5: Solve for x
    x = 11,785,629,985.67/101,301
  6. Step 6: Final answer
    x = 116,342.68

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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.