Home / 128,689.45-192,968.35-53,789.15

Finding the Fourth Proportional to 128,689.45, 192,968.35 and 53,789.15

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Solution

The fourth proportional to 128,689.45, 192,968.35 and 53,789.15 is: 80,656.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,689.45 : 192,968.35 = 53,789.15 : x
  2. Step 2: Convert to fraction form
    128,689.45/192,968.35 = 53,789.15/x
  3. Step 3: Cross multiply
    128,689.45x = 192,968.35 × 53,789.15
  4. Step 4: Simplify right side
    128,689.45x = 10,379,603,871.35
  5. Step 5: Solve for x
    x = 10,379,603,871.35/128,689.45
  6. Step 6: Final answer
    x = 80,656.22

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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.