Home / 80,918.19-121,415.81-36,558.51

Finding the Fourth Proportional to 80,918.19, 121,415.81 and 36,558.51

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Solution

The fourth proportional to 80,918.19, 121,415.81 and 36,558.51 is: 54,855.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,918.19 : 121,415.81 = 36,558.51 : x
  2. Step 2: Convert to fraction form
    80,918.19/121,415.81 = 36,558.51/x
  3. Step 3: Cross multiply
    80,918.19x = 121,415.81 × 36,558.51
  4. Step 4: Simplify right side
    80,918.19x = 4,438,780,921.25
  5. Step 5: Solve for x
    x = 4,438,780,921.25/80,918.19
  6. Step 6: Final answer
    x = 54,855.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.