Home / 80,954.24-121,415.52-21,790.40

Finding the Fourth Proportional to 80,954.24, 121,415.52 and 21,790.40

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Solution

The fourth proportional to 80,954.24, 121,415.52 and 21,790.40 is: 32,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,954.24 : 121,415.52 = 21,790.40 : x
  2. Step 2: Convert to fraction form
    80,954.24/121,415.52 = 21,790.40/x
  3. Step 3: Cross multiply
    80,954.24x = 121,415.52 × 21,790.40
  4. Step 4: Simplify right side
    80,954.24x = 2,645,692,747.01
  5. Step 5: Solve for x
    x = 2,645,692,747.01/80,954.24
  6. Step 6: Final answer
    x = 32,681.34

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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.