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Finding the Fourth Proportional to 203,485.60, 305,228.40 and 103,952.80

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Solution

The fourth proportional to 203,485.60, 305,228.40 and 103,952.80 is: 155,929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,485.60 : 305,228.40 = 103,952.80 : x
  2. Step 2: Convert to fraction form
    203,485.60/305,228.40 = 103,952.80/x
  3. Step 3: Cross multiply
    203,485.60x = 305,228.40 × 103,952.80
  4. Step 4: Simplify right side
    203,485.60x = 31,729,346,819.52
  5. Step 5: Solve for x
    x = 31,729,346,819.52/203,485.60
  6. Step 6: Final answer
    x = 155,929.20

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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.