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Finding the Fourth Proportional to 99,801.45, 149,702.18 and 80,118.45

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Solution

The fourth proportional to 99,801.45, 149,702.18 and 80,118.45 is: 120,177.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,801.45 : 149,702.18 = 80,118.45 : x
  2. Step 2: Convert to fraction form
    99,801.45/149,702.18 = 80,118.45/x
  3. Step 3: Cross multiply
    99,801.45x = 149,702.18 × 80,118.45
  4. Step 4: Simplify right side
    99,801.45x = 11,993,906,222.63
  5. Step 5: Solve for x
    x = 11,993,906,222.63/99,801.45
  6. Step 6: Final answer
    x = 120,177.68

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1.5x scale

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.