Home / 209,207.56-288,869.36-128,672.52

Finding the Fourth Proportional to 209,207.56, 288,869.36 and 128,672.52

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Solution

The fourth proportional to 209,207.56, 288,869.36 and 128,672.52 is: 177,668.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,207.56 : 288,869.36 = 128,672.52 : x
  2. Step 2: Convert to fraction form
    209,207.56/288,869.36 = 128,672.52/x
  3. Step 3: Cross multiply
    209,207.56x = 288,869.36 × 128,672.52
  4. Step 4: Simplify right side
    209,207.56x = 37,169,548,501.99
  5. Step 5: Solve for x
    x = 37,169,548,501.99/209,207.56
  6. Step 6: Final answer
    x = 177,668.29

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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.