Home / 128,564.16-192,855.42-39,806.28

Finding the Fourth Proportional to 128,564.16, 192,855.42 and 39,806.28

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Solution

The fourth proportional to 128,564.16, 192,855.42 and 39,806.28 is: 59,712.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.16 : 192,855.42 = 39,806.28 : x
  2. Step 2: Convert to fraction form
    128,564.16/192,855.42 = 39,806.28/x
  3. Step 3: Cross multiply
    128,564.16x = 192,855.42 × 39,806.28
  4. Step 4: Simplify right side
    128,564.16x = 7,676,856,848.04
  5. Step 5: Solve for x
    x = 7,676,856,848.04/128,564.16
  6. Step 6: Final answer
    x = 59,712.26

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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.