Home / 209,939.50-289,819.94-145,457.63

Finding the Fourth Proportional to 209,939.50, 289,819.94 and 145,457.63

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Solution

The fourth proportional to 209,939.50, 289,819.94 and 145,457.63 is: 200,803.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,939.50 : 289,819.94 = 145,457.63 : x
  2. Step 2: Convert to fraction form
    209,939.50/289,819.94 = 145,457.63/x
  3. Step 3: Cross multiply
    209,939.50x = 289,819.94 × 145,457.63
  4. Step 4: Simplify right side
    209,939.50x = 42,156,521,599.14
  5. Step 5: Solve for x
    x = 42,156,521,599.14/209,939.50
  6. Step 6: Final answer
    x = 200,803.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.