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Finding the Fourth Proportional to 101,361.49, 139,874.47 and 55,420.29

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Solution

The fourth proportional to 101,361.49, 139,874.47 and 55,420.29 is: 76,477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,361.49 : 139,874.47 = 55,420.29 : x
  2. Step 2: Convert to fraction form
    101,361.49/139,874.47 = 55,420.29/x
  3. Step 3: Cross multiply
    101,361.49x = 139,874.47 × 55,420.29
  4. Step 4: Simplify right side
    101,361.49x = 7,751,883,552.45
  5. Step 5: Solve for x
    x = 7,751,883,552.45/101,361.49
  6. Step 6: Final answer
    x = 76,477.60

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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.