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Finding the Fourth Proportional to 70,403.60, 105,682.20 and 39,299.60

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Solution

The fourth proportional to 70,403.60, 105,682.20 and 39,299.60 is: 58,992.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,403.60 : 105,682.20 = 39,299.60 : x
  2. Step 2: Convert to fraction form
    70,403.60/105,682.20 = 39,299.60/x
  3. Step 3: Cross multiply
    70,403.60x = 105,682.20 × 39,299.60
  4. Step 4: Simplify right side
    70,403.60x = 4,153,268,187.12
  5. Step 5: Solve for x
    x = 4,153,268,187.12/70,403.60
  6. Step 6: Final answer
    x = 58,992.27

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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.