Home / 315,238,823.87-472,448,029.73-128,274,835.34

Finding the Fourth Proportional to 315,238,823.87, 472,448,029.73 and 128,274,835.34

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Solution

The fourth proportional to 315,238,823.87, 472,448,029.73 and 128,274,835.34 is: 192,245,334.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,238,823.87 : 472,448,029.73 = 128,274,835.34 : x
  2. Step 2: Convert to fraction form
    315,238,823.87/472,448,029.73 = 128,274,835.34/x
  3. Step 3: Cross multiply
    315,238,823.87x = 472,448,029.73 × 128,274,835.34
  4. Step 4: Simplify right side
    315,238,823.87x = 60,603,193,220,862,928
  5. Step 5: Solve for x
    x = 60,603,193,220,862,928/315,238,823.87
  6. Step 6: Final answer
    x = 192,245,334.75

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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.