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Finding the Fourth Proportional to 100,857.70, 151,286.55 and 99,108.10

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Solution

The fourth proportional to 100,857.70, 151,286.55 and 99,108.10 is: 148,662.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,857.70 : 151,286.55 = 99,108.10 : x
  2. Step 2: Convert to fraction form
    100,857.70/151,286.55 = 99,108.10/x
  3. Step 3: Cross multiply
    100,857.70x = 151,286.55 × 99,108.10
  4. Step 4: Simplify right side
    100,857.70x = 14,993,722,526.06
  5. Step 5: Solve for x
    x = 14,993,722,526.06/100,857.70
  6. Step 6: Final answer
    x = 148,662.15

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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.