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Finding the Fourth Proportional to 203,962.30, 306,052.80 and 85,645.60

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Solution

The fourth proportional to 203,962.30, 306,052.80 and 85,645.60 is: 128,514.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,962.30 : 306,052.80 = 85,645.60 : x
  2. Step 2: Convert to fraction form
    203,962.30/306,052.80 = 85,645.60/x
  3. Step 3: Cross multiply
    203,962.30x = 306,052.80 × 85,645.60
  4. Step 4: Simplify right side
    203,962.30x = 26,212,075,687.68
  5. Step 5: Solve for x
    x = 26,212,075,687.68/203,962.30
  6. Step 6: Final answer
    x = 128,514.32

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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.