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Finding the Fourth Proportional to 259,344.72, 389,024.28 and 72,356.04

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Solution

The fourth proportional to 259,344.72, 389,024.28 and 72,356.04 is: 108,536.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,344.72 : 389,024.28 = 72,356.04 : x
  2. Step 2: Convert to fraction form
    259,344.72/389,024.28 = 72,356.04/x
  3. Step 3: Cross multiply
    259,344.72x = 389,024.28 × 72,356.04
  4. Step 4: Simplify right side
    259,344.72x = 28,148,256,364.65
  5. Step 5: Solve for x
    x = 28,148,256,364.65/259,344.72
  6. Step 6: Final answer
    x = 108,536.07

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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.