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Finding the Fourth Proportional to 55,177.20, 82,765.80 and 20,112.30

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Solution

The fourth proportional to 55,177.20, 82,765.80 and 20,112.30 is: 30,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,177.20 : 82,765.80 = 20,112.30 : x
  2. Step 2: Convert to fraction form
    55,177.20/82,765.80 = 20,112.30/x
  3. Step 3: Cross multiply
    55,177.20x = 82,765.80 × 20,112.30
  4. Step 4: Simplify right side
    55,177.20x = 1,664,610,599.34
  5. Step 5: Solve for x
    x = 1,664,610,599.34/55,177.20
  6. Step 6: Final answer
    x = 30,168.45

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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.