Home / 280,831.05-421,246.58-81,157.95

Finding the Fourth Proportional to 280,831.05, 421,246.58 and 81,157.95

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Solution

The fourth proportional to 280,831.05, 421,246.58 and 81,157.95 is: 121,736.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,831.05 : 421,246.58 = 81,157.95 : x
  2. Step 2: Convert to fraction form
    280,831.05/421,246.58 = 81,157.95/x
  3. Step 3: Cross multiply
    280,831.05x = 421,246.58 × 81,157.95
  4. Step 4: Simplify right side
    280,831.05x = 34,187,508,471.52
  5. Step 5: Solve for x
    x = 34,187,508,471.52/280,831.05
  6. Step 6: Final answer
    x = 121,736.93

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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.