Home / 100,851.12-139,174.56-55,529.28

Finding the Fourth Proportional to 100,851.12, 139,174.56 and 55,529.28

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Solution

The fourth proportional to 100,851.12, 139,174.56 and 55,529.28 is: 76,630.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,851.12 : 139,174.56 = 55,529.28 : x
  2. Step 2: Convert to fraction form
    100,851.12/139,174.56 = 55,529.28/x
  3. Step 3: Cross multiply
    100,851.12x = 139,174.56 × 55,529.28
  4. Step 4: Simplify right side
    100,851.12x = 7,728,263,111.12
  5. Step 5: Solve for x
    x = 7,728,263,111.12/100,851.12
  6. Step 6: Final answer
    x = 76,630.41

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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.