Home / 188,128.07-282,235.20-81,529.91

Finding the Fourth Proportional to 188,128.07, 282,235.20 and 81,529.91

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Solution

The fourth proportional to 188,128.07, 282,235.20 and 81,529.91 is: 122,313.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,128.07 : 282,235.20 = 81,529.91 : x
  2. Step 2: Convert to fraction form
    188,128.07/282,235.20 = 81,529.91/x
  3. Step 3: Cross multiply
    188,128.07x = 282,235.20 × 81,529.91
  4. Step 4: Simplify right side
    188,128.07x = 23,010,610,407.78
  5. Step 5: Solve for x
    x = 23,010,610,407.78/188,128.07
  6. Step 6: Final answer
    x = 122,313.54

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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.