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Finding the Fourth Proportional to 203,629.60, 305,638.80 and 103,902.40

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Solution

The fourth proportional to 203,629.60, 305,638.80 and 103,902.40 is: 155,952.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,629.60 : 305,638.80 = 103,902.40 : x
  2. Step 2: Convert to fraction form
    203,629.60/305,638.80 = 103,902.40/x
  3. Step 3: Cross multiply
    203,629.60x = 305,638.80 × 103,902.40
  4. Step 4: Simplify right side
    203,629.60x = 31,756,604,853.12
  5. Step 5: Solve for x
    x = 31,756,604,853.12/203,629.60
  6. Step 6: Final answer
    x = 155,952.79

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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.