Home / 128,635.20-192,538.08-66,219.84

Finding the Fourth Proportional to 128,635.20, 192,538.08 and 66,219.84

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Solution

The fourth proportional to 128,635.20, 192,538.08 and 66,219.84 is: 99,116.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,635.20 : 192,538.08 = 66,219.84 : x
  2. Step 2: Convert to fraction form
    128,635.20/192,538.08 = 66,219.84/x
  3. Step 3: Cross multiply
    128,635.20x = 192,538.08 × 66,219.84
  4. Step 4: Simplify right side
    128,635.20x = 12,749,840,851.51
  5. Step 5: Solve for x
    x = 12,749,840,851.51/128,635.20
  6. Step 6: Final answer
    x = 99,116.27

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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.