Home / 90,650.91-135,929.63-40,688.18

Finding the Fourth Proportional to 90,650.91, 135,929.63 and 40,688.18

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Solution

The fourth proportional to 90,650.91, 135,929.63 and 40,688.18 is: 61,011.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,650.91 : 135,929.63 = 40,688.18 : x
  2. Step 2: Convert to fraction form
    90,650.91/135,929.63 = 40,688.18/x
  3. Step 3: Cross multiply
    90,650.91x = 135,929.63 × 40,688.18
  4. Step 4: Simplify right side
    90,650.91x = 5,530,728,674.85
  5. Step 5: Solve for x
    x = 5,530,728,674.85/90,650.91
  6. Step 6: Final answer
    x = 61,011.29

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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.