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Finding the Fourth Proportional to 55,225.60, 82,838.40 and 20,190.40

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Solution

The fourth proportional to 55,225.60, 82,838.40 and 20,190.40 is: 30,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,225.60 : 82,838.40 = 20,190.40 : x
  2. Step 2: Convert to fraction form
    55,225.60/82,838.40 = 20,190.40/x
  3. Step 3: Cross multiply
    55,225.60x = 82,838.40 × 20,190.40
  4. Step 4: Simplify right side
    55,225.60x = 1,672,540,431.36
  5. Step 5: Solve for x
    x = 1,672,540,431.36/55,225.60
  6. Step 6: Final answer
    x = 30,285.60

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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.