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Finding the Fourth Proportional to 112,728.40, 168,970.56 and 73,313.80

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Solution

The fourth proportional to 112,728.40, 168,970.56 and 73,313.80 is: 109,891.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,728.40 : 168,970.56 = 73,313.80 : x
  2. Step 2: Convert to fraction form
    112,728.40/168,970.56 = 73,313.80/x
  3. Step 3: Cross multiply
    112,728.40x = 168,970.56 × 73,313.80
  4. Step 4: Simplify right side
    112,728.40x = 12,387,873,841.73
  5. Step 5: Solve for x
    x = 12,387,873,841.73/112,728.40
  6. Step 6: Final answer
    x = 109,891.33

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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.