Home / 71,136.12-106,702.97-21,216.36

Finding the Fourth Proportional to 71,136.12, 106,702.97 and 21,216.36

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Solution

The fourth proportional to 71,136.12, 106,702.97 and 21,216.36 is: 31,824.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,136.12 : 106,702.97 = 21,216.36 : x
  2. Step 2: Convert to fraction form
    71,136.12/106,702.97 = 21,216.36/x
  3. Step 3: Cross multiply
    71,136.12x = 106,702.97 × 21,216.36
  4. Step 4: Simplify right side
    71,136.12x = 2,263,849,037.99
  5. Step 5: Solve for x
    x = 2,263,849,037.99/71,136.12
  6. Step 6: Final answer
    x = 31,824.18

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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.