Home / 128,534.06-192,809.24-39,780.11

Finding the Fourth Proportional to 128,534.06, 192,809.24 and 39,780.11

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Solution

The fourth proportional to 128,534.06, 192,809.24 and 39,780.11 is: 59,672.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,534.06 : 192,809.24 = 39,780.11 : x
  2. Step 2: Convert to fraction form
    128,534.06/192,809.24 = 39,780.11/x
  3. Step 3: Cross multiply
    128,534.06x = 192,809.24 × 39,780.11
  4. Step 4: Simplify right side
    128,534.06x = 7,669,971,613.27
  5. Step 5: Solve for x
    x = 7,669,971,613.27/128,534.06
  6. Step 6: Final answer
    x = 59,672.68

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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.