Home / 100,629.42-138,871.92-55,309.01

Finding the Fourth Proportional to 100,629.42, 138,871.92 and 55,309.01

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Solution

The fourth proportional to 100,629.42, 138,871.92 and 55,309.01 is: 76,328.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,629.42 : 138,871.92 = 55,309.01 : x
  2. Step 2: Convert to fraction form
    100,629.42/138,871.92 = 55,309.01/x
  3. Step 3: Cross multiply
    100,629.42x = 138,871.92 × 55,309.01
  4. Step 4: Simplify right side
    100,629.42x = 7,680,867,717.64
  5. Step 5: Solve for x
    x = 7,680,867,717.64/100,629.42
  6. Step 6: Final answer
    x = 76,328.25

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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.