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Finding the Fourth Proportional to 101,048.04, 139,449.60 and 55,728

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Solution

The fourth proportional to 101,048.04, 139,449.60 and 55,728 is: 76,906.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,048.04 : 139,449.60 = 55,728 : x
  2. Step 2: Convert to fraction form
    101,048.04/139,449.60 = 55,728/x
  3. Step 3: Cross multiply
    101,048.04x = 139,449.60 × 55,728
  4. Step 4: Simplify right side
    101,048.04x = 7,771,247,308.80
  5. Step 5: Solve for x
    x = 7,771,247,308.80/101,048.04
  6. Step 6: Final answer
    x = 76,906.46

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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.