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Finding the Fourth Proportional to 128,262.51, 192,290.04 and 53,438.96

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Solution

The fourth proportional to 128,262.51, 192,290.04 and 53,438.96 is: 80,115.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,262.51 : 192,290.04 = 53,438.96 : x
  2. Step 2: Convert to fraction form
    128,262.51/192,290.04 = 53,438.96/x
  3. Step 3: Cross multiply
    128,262.51x = 192,290.04 × 53,438.96
  4. Step 4: Simplify right side
    128,262.51x = 10,275,778,794.51
  5. Step 5: Solve for x
    x = 10,275,778,794.51/128,262.51
  6. Step 6: Final answer
    x = 80,115.22

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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.