Home / 112,028.80-168,043.20-99,781.60

Finding the Fourth Proportional to 112,028.80, 168,043.20 and 99,781.60

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Solution

The fourth proportional to 112,028.80, 168,043.20 and 99,781.60 is: 149,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,028.80 : 168,043.20 = 99,781.60 : x
  2. Step 2: Convert to fraction form
    112,028.80/168,043.20 = 99,781.60/x
  3. Step 3: Cross multiply
    112,028.80x = 168,043.20 × 99,781.60
  4. Step 4: Simplify right side
    112,028.80x = 16,767,619,365.12
  5. Step 5: Solve for x
    x = 16,767,619,365.12/112,028.80
  6. Step 6: Final answer
    x = 149,672.40

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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.