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Finding the Fourth Proportional to 67,986.60, 101,979.90 and 43,054.80

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Solution

The fourth proportional to 67,986.60, 101,979.90 and 43,054.80 is: 64,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,986.60 : 101,979.90 = 43,054.80 : x
  2. Step 2: Convert to fraction form
    67,986.60/101,979.90 = 43,054.80/x
  3. Step 3: Cross multiply
    67,986.60x = 101,979.90 × 43,054.80
  4. Step 4: Simplify right side
    67,986.60x = 4,390,724,198.52
  5. Step 5: Solve for x
    x = 4,390,724,198.52/67,986.60
  6. Step 6: Final answer
    x = 64,582.20

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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.