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Finding the Fourth Proportional to 203,808.42, 305,643.51 and 77,418.18

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Solution

The fourth proportional to 203,808.42, 305,643.51 and 77,418.18 is: 116,101.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,808.42 : 305,643.51 = 77,418.18 : x
  2. Step 2: Convert to fraction form
    203,808.42/305,643.51 = 77,418.18/x
  3. Step 3: Cross multiply
    203,808.42x = 305,643.51 × 77,418.18
  4. Step 4: Simplify right side
    203,808.42x = 23,662,364,273.01
  5. Step 5: Solve for x
    x = 23,662,364,273.01/203,808.42
  6. Step 6: Final answer
    x = 116,101.01

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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.