Home / 80,955.24-121,417.02-21,791.40

Finding the Fourth Proportional to 80,955.24, 121,417.02 and 21,791.40

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Solution

The fourth proportional to 80,955.24, 121,417.02 and 21,791.40 is: 32,682.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,955.24 : 121,417.02 = 21,791.40 : x
  2. Step 2: Convert to fraction form
    80,955.24/121,417.02 = 21,791.40/x
  3. Step 3: Cross multiply
    80,955.24x = 121,417.02 × 21,791.40
  4. Step 4: Simplify right side
    80,955.24x = 2,645,846,849.63
  5. Step 5: Solve for x
    x = 2,645,846,849.63/80,955.24
  6. Step 6: Final answer
    x = 32,682.84

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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.