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Finding the Fourth Proportional to 79,485.87, 109,690.19 and 45,494.22

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Solution

The fourth proportional to 79,485.87, 109,690.19 and 45,494.22 is: 62,781.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,485.87 : 109,690.19 = 45,494.22 : x
  2. Step 2: Convert to fraction form
    79,485.87/109,690.19 = 45,494.22/x
  3. Step 3: Cross multiply
    79,485.87x = 109,690.19 × 45,494.22
  4. Step 4: Simplify right side
    79,485.87x = 4,990,269,408.23
  5. Step 5: Solve for x
    x = 4,990,269,408.23/79,485.87
  6. Step 6: Final answer
    x = 62,781.84

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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.