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Finding the Fourth Proportional to 289,694.20, 434,411.70 and 112,142.20

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Solution

The fourth proportional to 289,694.20, 434,411.70 and 112,142.20 is: 168,163.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,694.20 : 434,411.70 = 112,142.20 : x
  2. Step 2: Convert to fraction form
    289,694.20/434,411.70 = 112,142.20/x
  3. Step 3: Cross multiply
    289,694.20x = 434,411.70 × 112,142.20
  4. Step 4: Simplify right side
    289,694.20x = 48,715,883,743.74
  5. Step 5: Solve for x
    x = 48,715,883,743.74/289,694.20
  6. Step 6: Final answer
    x = 168,163.13

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1.5x scale

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.