Home / 128,288.80-192,433.20-39,534.40

Finding the Fourth Proportional to 128,288.80, 192,433.20 and 39,534.40

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Solution

The fourth proportional to 128,288.80, 192,433.20 and 39,534.40 is: 59,301.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288.80 : 192,433.20 = 39,534.40 : x
  2. Step 2: Convert to fraction form
    128,288.80/192,433.20 = 39,534.40/x
  3. Step 3: Cross multiply
    128,288.80x = 192,433.20 × 39,534.40
  4. Step 4: Simplify right side
    128,288.80x = 7,607,731,102.08
  5. Step 5: Solve for x
    x = 7,607,731,102.08/128,288.80
  6. Step 6: Final answer
    x = 59,301.60

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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.