Home / 280,709.22-421,065.65-112,243.70

Finding the Fourth Proportional to 280,709.22, 421,065.65 and 112,243.70

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Solution

The fourth proportional to 280,709.22, 421,065.65 and 112,243.70 is: 168,366.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,709.22 : 421,065.65 = 112,243.70 : x
  2. Step 2: Convert to fraction form
    280,709.22/421,065.65 = 112,243.70/x
  3. Step 3: Cross multiply
    280,709.22x = 421,065.65 × 112,243.70
  4. Step 4: Simplify right side
    280,709.22x = 47,261,967,832.18
  5. Step 5: Solve for x
    x = 47,261,967,832.18/280,709.22
  6. Step 6: Final answer
    x = 168,366.28

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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.