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Finding the Fourth Proportional to 45,698.16, 68,621.64 and 28,278.96

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Solution

The fourth proportional to 45,698.16, 68,621.64 and 28,278.96 is: 42,464.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,698.16 : 68,621.64 = 28,278.96 : x
  2. Step 2: Convert to fraction form
    45,698.16/68,621.64 = 28,278.96/x
  3. Step 3: Cross multiply
    45,698.16x = 68,621.64 × 28,278.96
  4. Step 4: Simplify right side
    45,698.16x = 1,940,548,612.69
  5. Step 5: Solve for x
    x = 1,940,548,612.69/45,698.16
  6. Step 6: Final answer
    x = 42,464.48

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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.