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Finding the Fourth Proportional to 99,662.94, 137,219.67 and 80,862.30

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Solution

The fourth proportional to 99,662.94, 137,219.67 and 80,862.30 is: 111,334.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,662.94 : 137,219.67 = 80,862.30 : x
  2. Step 2: Convert to fraction form
    99,662.94/137,219.67 = 80,862.30/x
  3. Step 3: Cross multiply
    99,662.94x = 137,219.67 × 80,862.30
  4. Step 4: Simplify right side
    99,662.94x = 11,095,898,121.44
  5. Step 5: Solve for x
    x = 11,095,898,121.44/99,662.94
  6. Step 6: Final answer
    x = 111,334.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.