Home / 280,981.14-421,471.71-103,422.66

Finding the Fourth Proportional to 280,981.14, 421,471.71 and 103,422.66

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Solution

The fourth proportional to 280,981.14, 421,471.71 and 103,422.66 is: 155,133.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,981.14 : 421,471.71 = 103,422.66 : x
  2. Step 2: Convert to fraction form
    280,981.14/421,471.71 = 103,422.66/x
  3. Step 3: Cross multiply
    280,981.14x = 421,471.71 × 103,422.66
  4. Step 4: Simplify right side
    280,981.14x = 43,589,725,362.95
  5. Step 5: Solve for x
    x = 43,589,725,362.95/280,981.14
  6. Step 6: Final answer
    x = 155,133.99

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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.