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Finding the Fourth Proportional to 78,290.44, 108,120.90 and 73,274.92

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Solution

The fourth proportional to 78,290.44, 108,120.90 and 73,274.92 is: 101,194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,290.44 : 108,120.90 = 73,274.92 : x
  2. Step 2: Convert to fraction form
    78,290.44/108,120.90 = 73,274.92/x
  3. Step 3: Cross multiply
    78,290.44x = 108,120.90 × 73,274.92
  4. Step 4: Simplify right side
    78,290.44x = 7,922,550,297.83
  5. Step 5: Solve for x
    x = 7,922,550,297.83/78,290.44
  6. Step 6: Final answer
    x = 101,194.35

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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.