Home / 128,525.20-192,787.80-39,805.90

Finding the Fourth Proportional to 128,525.20, 192,787.80 and 39,805.90

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Solution

The fourth proportional to 128,525.20, 192,787.80 and 39,805.90 is: 59,708.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.20 : 192,787.80 = 39,805.90 : x
  2. Step 2: Convert to fraction form
    128,525.20/192,787.80 = 39,805.90/x
  3. Step 3: Cross multiply
    128,525.20x = 192,787.80 × 39,805.90
  4. Step 4: Simplify right side
    128,525.20x = 7,674,091,888.02
  5. Step 5: Solve for x
    x = 7,674,091,888.02/128,525.20
  6. Step 6: Final answer
    x = 59,708.85

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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.