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Finding the Fourth Proportional to 203,203.60, 304,978.20 and 91,056.40

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Solution

The fourth proportional to 203,203.60, 304,978.20 and 91,056.40 is: 136,662.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,203.60 : 304,978.20 = 91,056.40 : x
  2. Step 2: Convert to fraction form
    203,203.60/304,978.20 = 91,056.40/x
  3. Step 3: Cross multiply
    203,203.60x = 304,978.20 × 91,056.40
  4. Step 4: Simplify right side
    203,203.60x = 27,770,216,970.48
  5. Step 5: Solve for x
    x = 27,770,216,970.48/203,203.60
  6. Step 6: Final answer
    x = 136,662.03

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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.