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Finding the Fourth Proportional to 43,990.80, 65,986.20 and 39,613.20

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Solution

The fourth proportional to 43,990.80, 65,986.20 and 39,613.20 is: 59,419.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,990.80 : 65,986.20 = 39,613.20 : x
  2. Step 2: Convert to fraction form
    43,990.80/65,986.20 = 39,613.20/x
  3. Step 3: Cross multiply
    43,990.80x = 65,986.20 × 39,613.20
  4. Step 4: Simplify right side
    43,990.80x = 2,613,924,537.84
  5. Step 5: Solve for x
    x = 2,613,924,537.84/43,990.80
  6. Step 6: Final answer
    x = 59,419.80

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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.