Home / 78,815.20-118,222.80-74,149.60

Finding the Fourth Proportional to 78,815.20, 118,222.80 and 74,149.60

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Solution

The fourth proportional to 78,815.20, 118,222.80 and 74,149.60 is: 111,224.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.20 : 118,222.80 = 74,149.60 : x
  2. Step 2: Convert to fraction form
    78,815.20/118,222.80 = 74,149.60/x
  3. Step 3: Cross multiply
    78,815.20x = 118,222.80 × 74,149.60
  4. Step 4: Simplify right side
    78,815.20x = 8,766,173,330.88
  5. Step 5: Solve for x
    x = 8,766,173,330.88/78,815.20
  6. Step 6: Final answer
    x = 111,224.40

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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.