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Finding the Fourth Proportional to 68,698.80, 103,048.20 and 47,703.60

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Solution

The fourth proportional to 68,698.80, 103,048.20 and 47,703.60 is: 71,555.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,698.80 : 103,048.20 = 47,703.60 : x
  2. Step 2: Convert to fraction form
    68,698.80/103,048.20 = 47,703.60/x
  3. Step 3: Cross multiply
    68,698.80x = 103,048.20 × 47,703.60
  4. Step 4: Simplify right side
    68,698.80x = 4,915,770,113.52
  5. Step 5: Solve for x
    x = 4,915,770,113.52/68,698.80
  6. Step 6: Final answer
    x = 71,555.40

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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.