Home / 81,136.02-121,689-21,963.99

Finding the Fourth Proportional to 81,136.02, 121,689 and 21,963.99

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Solution

The fourth proportional to 81,136.02, 121,689 and 21,963.99 is: 32,941.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,136.02 : 121,689 = 21,963.99 : x
  2. Step 2: Convert to fraction form
    81,136.02/121,689 = 21,963.99/x
  3. Step 3: Cross multiply
    81,136.02x = 121,689 × 21,963.99
  4. Step 4: Simplify right side
    81,136.02x = 2,672,775,979.11
  5. Step 5: Solve for x
    x = 2,672,775,979.11/81,136.02
  6. Step 6: Final answer
    x = 32,941.92

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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.