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Finding the Fourth Proportional to 70,879.70, 106,210.20 and 61,475.60

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Solution

The fourth proportional to 70,879.70, 106,210.20 and 61,475.60 is: 92,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,879.70 : 106,210.20 = 61,475.60 : x
  2. Step 2: Convert to fraction form
    70,879.70/106,210.20 = 61,475.60/x
  3. Step 3: Cross multiply
    70,879.70x = 106,210.20 × 61,475.60
  4. Step 4: Simplify right side
    70,879.70x = 6,529,335,771.12
  5. Step 5: Solve for x
    x = 6,529,335,771.12/70,879.70
  6. Step 6: Final answer
    x = 92,118.56

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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.