Home / 258,048,467.40-387,105,878.70-128,722,182.60

Finding the Fourth Proportional to 258,048,467.40, 387,105,878.70 and 128,722,182.60

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Solution

The fourth proportional to 258,048,467.40, 387,105,878.70 and 128,722,182.60 is: 193,099,823.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,048,467.40 : 387,105,878.70 = 128,722,182.60 : x
  2. Step 2: Convert to fraction form
    258,048,467.40/387,105,878.70 = 128,722,182.60/x
  3. Step 3: Cross multiply
    258,048,467.40x = 387,105,878.70 × 128,722,182.60
  4. Step 4: Simplify right side
    258,048,467.40x = 49,829,113,603,554,848
  5. Step 5: Solve for x
    x = 49,829,113,603,554,848/258,048,467.40
  6. Step 6: Final answer
    x = 193,099,823.86

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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.