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Finding the Fourth Proportional to 112,112.64, 168,055.56 and 72,694.80

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Solution

The fourth proportional to 112,112.64, 168,055.56 and 72,694.80 is: 108,968.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,112.64 : 168,055.56 = 72,694.80 : x
  2. Step 2: Convert to fraction form
    112,112.64/168,055.56 = 72,694.80/x
  3. Step 3: Cross multiply
    112,112.64x = 168,055.56 × 72,694.80
  4. Step 4: Simplify right side
    112,112.64x = 12,216,765,323.09
  5. Step 5: Solve for x
    x = 12,216,765,323.09/112,112.64
  6. Step 6: Final answer
    x = 108,968.67

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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.