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Finding the Fourth Proportional to 54,415.20, 81,622.80 and 54,069.60

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Solution

The fourth proportional to 54,415.20, 81,622.80 and 54,069.60 is: 81,104.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,415.20 : 81,622.80 = 54,069.60 : x
  2. Step 2: Convert to fraction form
    54,415.20/81,622.80 = 54,069.60/x
  3. Step 3: Cross multiply
    54,415.20x = 81,622.80 × 54,069.60
  4. Step 4: Simplify right side
    54,415.20x = 4,413,312,146.88
  5. Step 5: Solve for x
    x = 4,413,312,146.88/54,415.20
  6. Step 6: Final answer
    x = 81,104.40

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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.