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Finding the Fourth Proportional to 185,428.80, 278,143.20 and 45,188.64

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Solution

The fourth proportional to 185,428.80, 278,143.20 and 45,188.64 is: 67,782.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,428.80 : 278,143.20 = 45,188.64 : x
  2. Step 2: Convert to fraction form
    185,428.80/278,143.20 = 45,188.64/x
  3. Step 3: Cross multiply
    185,428.80x = 278,143.20 × 45,188.64
  4. Step 4: Simplify right side
    185,428.80x = 12,568,912,933.25
  5. Step 5: Solve for x
    x = 12,568,912,933.25/185,428.80
  6. Step 6: Final answer
    x = 67,782.96

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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.