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Finding the Fourth Proportional to 203,512.64, 305,315.48 and 70,392.78

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Solution

The fourth proportional to 203,512.64, 305,315.48 and 70,392.78 is: 105,605.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,512.64 : 305,315.48 = 70,392.78 : x
  2. Step 2: Convert to fraction form
    203,512.64/305,315.48 = 70,392.78/x
  3. Step 3: Cross multiply
    203,512.64x = 305,315.48 × 70,392.78
  4. Step 4: Simplify right side
    203,512.64x = 21,492,005,414.23
  5. Step 5: Solve for x
    x = 21,492,005,414.23/203,512.64
  6. Step 6: Final answer
    x = 105,605.26

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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.