Home / 128,426.85-192,660.86-39,659.49

Finding the Fourth Proportional to 128,426.85, 192,660.86 and 39,659.49

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Solution

The fourth proportional to 128,426.85, 192,660.86 and 39,659.49 is: 59,495.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.85 : 192,660.86 = 39,659.49 : x
  2. Step 2: Convert to fraction form
    128,426.85/192,660.86 = 39,659.49/x
  3. Step 3: Cross multiply
    128,426.85x = 192,660.86 × 39,659.49
  4. Step 4: Simplify right side
    128,426.85x = 7,640,831,252.26
  5. Step 5: Solve for x
    x = 7,640,831,252.26/128,426.85
  6. Step 6: Final answer
    x = 59,495.59

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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.