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Finding the Fourth Proportional to 280,573.20, 421,043.94 and 103,081.68

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Solution

The fourth proportional to 280,573.20, 421,043.94 and 103,081.68 is: 154,690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,573.20 : 421,043.94 = 103,081.68 : x
  2. Step 2: Convert to fraction form
    280,573.20/421,043.94 = 103,081.68/x
  3. Step 3: Cross multiply
    280,573.20x = 421,043.94 × 103,081.68
  4. Step 4: Simplify right side
    280,573.20x = 43,401,916,689.02
  5. Step 5: Solve for x
    x = 43,401,916,689.02/280,573.20
  6. Step 6: Final answer
    x = 154,690.17

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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.