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Finding the Fourth Proportional to 102,990.80, 154,486.20 and 101,241.20

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Solution

The fourth proportional to 102,990.80, 154,486.20 and 101,241.20 is: 151,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.80 : 154,486.20 = 101,241.20 : x
  2. Step 2: Convert to fraction form
    102,990.80/154,486.20 = 101,241.20/x
  3. Step 3: Cross multiply
    102,990.80x = 154,486.20 × 101,241.20
  4. Step 4: Simplify right side
    102,990.80x = 15,640,368,271.44
  5. Step 5: Solve for x
    x = 15,640,368,271.44/102,990.80
  6. Step 6: Final answer
    x = 151,861.80

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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.