Home / 128,606.49-192,839.27-39,835.35

Finding the Fourth Proportional to 128,606.49, 192,839.27 and 39,835.35

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Solution

The fourth proportional to 128,606.49, 192,839.27 and 39,835.35 is: 59,731.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,606.49 : 192,839.27 = 39,835.35 : x
  2. Step 2: Convert to fraction form
    128,606.49/192,839.27 = 39,835.35/x
  3. Step 3: Cross multiply
    128,606.49x = 192,839.27 × 39,835.35
  4. Step 4: Simplify right side
    128,606.49x = 7,681,819,615.02
  5. Step 5: Solve for x
    x = 7,681,819,615.02/128,606.49
  6. Step 6: Final answer
    x = 59,731.20

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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.