Home / 128,111.20-191,907.60-88,712.80

Finding the Fourth Proportional to 128,111.20, 191,907.60 and 88,712.80

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Solution

The fourth proportional to 128,111.20, 191,907.60 and 88,712.80 is: 132,889.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,111.20 : 191,907.60 = 88,712.80 : x
  2. Step 2: Convert to fraction form
    128,111.20/191,907.60 = 88,712.80/x
  3. Step 3: Cross multiply
    128,111.20x = 191,907.60 × 88,712.80
  4. Step 4: Simplify right side
    128,111.20x = 17,024,660,537.28
  5. Step 5: Solve for x
    x = 17,024,660,537.28/128,111.20
  6. Step 6: Final answer
    x = 132,889.71

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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.