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Finding the Fourth Proportional to 84,348.45, 126,479.64 and 28,168.32

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Solution

The fourth proportional to 84,348.45, 126,479.64 and 28,168.32 is: 42,238.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,348.45 : 126,479.64 = 28,168.32 : x
  2. Step 2: Convert to fraction form
    84,348.45/126,479.64 = 28,168.32/x
  3. Step 3: Cross multiply
    84,348.45x = 126,479.64 × 28,168.32
  4. Step 4: Simplify right side
    84,348.45x = 3,562,718,973.00
  5. Step 5: Solve for x
    x = 3,562,718,973.00/84,348.45
  6. Step 6: Final answer
    x = 42,238.11

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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.