Home / 128,536.29-192,812.64-39,782.34

Finding the Fourth Proportional to 128,536.29, 192,812.64 and 39,782.34

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Solution

The fourth proportional to 128,536.29, 192,812.64 and 39,782.34 is: 59,676.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,536.29 : 192,812.64 = 39,782.34 : x
  2. Step 2: Convert to fraction form
    128,536.29/192,812.64 = 39,782.34/x
  3. Step 3: Cross multiply
    128,536.29x = 192,812.64 × 39,782.34
  4. Step 4: Simplify right side
    128,536.29x = 7,670,538,000.78
  5. Step 5: Solve for x
    x = 7,670,538,000.78/128,536.29
  6. Step 6: Final answer
    x = 59,676.05

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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.