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Finding the Fourth Proportional to 71,379.28, 107,107.80 and 43,230.16

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Solution

The fourth proportional to 71,379.28, 107,107.80 and 43,230.16 is: 64,868.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.28 : 107,107.80 = 43,230.16 : x
  2. Step 2: Convert to fraction form
    71,379.28/107,107.80 = 43,230.16/x
  3. Step 3: Cross multiply
    71,379.28x = 107,107.80 × 43,230.16
  4. Step 4: Simplify right side
    71,379.28x = 4,630,287,331.25
  5. Step 5: Solve for x
    x = 4,630,287,331.25/71,379.28
  6. Step 6: Final answer
    x = 64,868.79

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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.