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Finding the Fourth Proportional to 70,202.60, 96,879.60 and 39,990.74

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Solution

The fourth proportional to 70,202.60, 96,879.60 and 39,990.74 is: 55,187.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,202.60 : 96,879.60 = 39,990.74 : x
  2. Step 2: Convert to fraction form
    70,202.60/96,879.60 = 39,990.74/x
  3. Step 3: Cross multiply
    70,202.60x = 96,879.60 × 39,990.74
  4. Step 4: Simplify right side
    70,202.60x = 3,874,286,894.90
  5. Step 5: Solve for x
    x = 3,874,286,894.90/70,202.60
  6. Step 6: Final answer
    x = 55,187.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.