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Finding the Fourth Proportional to 70,481.80, 105,740.70 and 49,745.80

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Solution

The fourth proportional to 70,481.80, 105,740.70 and 49,745.80 is: 74,631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481.80 : 105,740.70 = 49,745.80 : x
  2. Step 2: Convert to fraction form
    70,481.80/105,740.70 = 49,745.80/x
  3. Step 3: Cross multiply
    70,481.80x = 105,740.70 × 49,745.80
  4. Step 4: Simplify right side
    70,481.80x = 5,260,155,714.06
  5. Step 5: Solve for x
    x = 5,260,155,714.06/70,481.80
  6. Step 6: Final answer
    x = 74,631.40

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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.