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Finding the Fourth Proportional to 45,168.82, 67,742.34 and 18,859.30

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Solution

The fourth proportional to 45,168.82, 67,742.34 and 18,859.30 is: 28,284.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,168.82 : 67,742.34 = 18,859.30 : x
  2. Step 2: Convert to fraction form
    45,168.82/67,742.34 = 18,859.30/x
  3. Step 3: Cross multiply
    45,168.82x = 67,742.34 × 18,859.30
  4. Step 4: Simplify right side
    45,168.82x = 1,277,573,112.76
  5. Step 5: Solve for x
    x = 1,277,573,112.76/45,168.82
  6. Step 6: Final answer
    x = 28,284.40

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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.