Home / 128,278,875.26-192,405,072.49-87,044,509.60

Finding the Fourth Proportional to 128,278,875.26, 192,405,072.49 and 87,044,509.60

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Solution

The fourth proportional to 128,278,875.26, 192,405,072.49 and 87,044,509.60 is: 130,557,780.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278,875.26 : 192,405,072.49 = 87,044,509.60 : x
  2. Step 2: Convert to fraction form
    128,278,875.26/192,405,072.49 = 87,044,509.60/x
  3. Step 3: Cross multiply
    128,278,875.26x = 192,405,072.49 × 87,044,509.60
  4. Step 4: Simplify right side
    128,278,875.26x = 16,747,805,179,444,500
  5. Step 5: Solve for x
    x = 16,747,805,179,444,500/128,278,875.26
  6. Step 6: Final answer
    x = 130,557,780.04

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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.