Home / 128,433.80-192,665.10-39,686.60

Finding the Fourth Proportional to 128,433.80, 192,665.10 and 39,686.60

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Solution

The fourth proportional to 128,433.80, 192,665.10 and 39,686.60 is: 59,534.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,433.80 : 192,665.10 = 39,686.60 : x
  2. Step 2: Convert to fraction form
    128,433.80/192,665.10 = 39,686.60/x
  3. Step 3: Cross multiply
    128,433.80x = 192,665.10 × 39,686.60
  4. Step 4: Simplify right side
    128,433.80x = 7,646,222,757.66
  5. Step 5: Solve for x
    x = 7,646,222,757.66/128,433.80
  6. Step 6: Final answer
    x = 59,534.35

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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.