Home / 128,040.72-192,061.80-49,135.92

Finding the Fourth Proportional to 128,040.72, 192,061.80 and 49,135.92

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Solution

The fourth proportional to 128,040.72, 192,061.80 and 49,135.92 is: 73,704.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,040.72 : 192,061.80 = 49,135.92 : x
  2. Step 2: Convert to fraction form
    128,040.72/192,061.80 = 49,135.92/x
  3. Step 3: Cross multiply
    128,040.72x = 192,061.80 × 49,135.92
  4. Step 4: Simplify right side
    128,040.72x = 9,437,133,239.86
  5. Step 5: Solve for x
    x = 9,437,133,239.86/128,040.72
  6. Step 6: Final answer
    x = 73,704.16

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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.