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Finding the Fourth Proportional to 78,459.64, 108,249.42 and 48,668.92

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Solution

The fourth proportional to 78,459.64, 108,249.42 and 48,668.92 is: 67,147.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,459.64 : 108,249.42 = 48,668.92 : x
  2. Step 2: Convert to fraction form
    78,459.64/108,249.42 = 48,668.92/x
  3. Step 3: Cross multiply
    78,459.64x = 108,249.42 × 48,668.92
  4. Step 4: Simplify right side
    78,459.64x = 5,268,382,362.03
  5. Step 5: Solve for x
    x = 5,268,382,362.03/78,459.64
  6. Step 6: Final answer
    x = 67,147.67

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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.