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Finding the Fourth Proportional to 205,090.60, 307,635.90 and 55,330.60

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Solution

The fourth proportional to 205,090.60, 307,635.90 and 55,330.60 is: 82,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,090.60 : 307,635.90 = 55,330.60 : x
  2. Step 2: Convert to fraction form
    205,090.60/307,635.90 = 55,330.60/x
  3. Step 3: Cross multiply
    205,090.60x = 307,635.90 × 55,330.60
  4. Step 4: Simplify right side
    205,090.60x = 17,021,678,928.54
  5. Step 5: Solve for x
    x = 17,021,678,928.54/205,090.60
  6. Step 6: Final answer
    x = 82,995.90

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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.