Home / 90,651.07-135,929.91-40,688.33

Finding the Fourth Proportional to 90,651.07, 135,929.91 and 40,688.33

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Solution

The fourth proportional to 90,651.07, 135,929.91 and 40,688.33 is: 61,011.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,651.07 : 135,929.91 = 40,688.33 : x
  2. Step 2: Convert to fraction form
    90,651.07/135,929.91 = 40,688.33/x
  3. Step 3: Cross multiply
    90,651.07x = 135,929.91 × 40,688.33
  4. Step 4: Simplify right side
    90,651.07x = 5,530,761,034.95
  5. Step 5: Solve for x
    x = 5,530,761,034.95/90,651.07
  6. Step 6: Final answer
    x = 61,011.54

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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.