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Finding the Fourth Proportional to 72,704.40, 109,056.60 and 63,081.60

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Solution

The fourth proportional to 72,704.40, 109,056.60 and 63,081.60 is: 94,622.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,704.40 : 109,056.60 = 63,081.60 : x
  2. Step 2: Convert to fraction form
    72,704.40/109,056.60 = 63,081.60/x
  3. Step 3: Cross multiply
    72,704.40x = 109,056.60 × 63,081.60
  4. Step 4: Simplify right side
    72,704.40x = 6,879,464,818.56
  5. Step 5: Solve for x
    x = 6,879,464,818.56/72,704.40
  6. Step 6: Final answer
    x = 94,622.40

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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.