Home / 209,555.91-289,207.35-129,030.57

Finding the Fourth Proportional to 209,555.91, 289,207.35 and 129,030.57

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Solution

The fourth proportional to 209,555.91, 289,207.35 and 129,030.57 is: 178,074.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,555.91 : 289,207.35 = 129,030.57 : x
  2. Step 2: Convert to fraction form
    209,555.91/289,207.35 = 129,030.57/x
  3. Step 3: Cross multiply
    209,555.91x = 289,207.35 × 129,030.57
  4. Step 4: Simplify right side
    209,555.91x = 37,316,589,218.69
  5. Step 5: Solve for x
    x = 37,316,589,218.69/209,555.91
  6. Step 6: Final answer
    x = 178,074.62

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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.