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Finding the Fourth Proportional to 78,704.20, 118,056.30 and 70,928.20

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Solution

The fourth proportional to 78,704.20, 118,056.30 and 70,928.20 is: 106,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,704.20 : 118,056.30 = 70,928.20 : x
  2. Step 2: Convert to fraction form
    78,704.20/118,056.30 = 70,928.20/x
  3. Step 3: Cross multiply
    78,704.20x = 118,056.30 × 70,928.20
  4. Step 4: Simplify right side
    78,704.20x = 8,373,520,857.66
  5. Step 5: Solve for x
    x = 8,373,520,857.66/78,704.20
  6. Step 6: Final answer
    x = 106,392.30

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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.