Home / 101,427.78-139,923.21-65,629.36

Finding the Fourth Proportional to 101,427.78, 139,923.21 and 65,629.36

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Solution

The fourth proportional to 101,427.78, 139,923.21 and 65,629.36 is: 90,538.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,427.78 : 139,923.21 = 65,629.36 : x
  2. Step 2: Convert to fraction form
    101,427.78/139,923.21 = 65,629.36/x
  3. Step 3: Cross multiply
    101,427.78x = 139,923.21 × 65,629.36
  4. Step 4: Simplify right side
    101,427.78x = 9,183,070,721.45
  5. Step 5: Solve for x
    x = 9,183,070,721.45/101,427.78
  6. Step 6: Final answer
    x = 90,538.02

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1.5x scale

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.