Home / 209,570.16-289,121.40-128,973.36

Finding the Fourth Proportional to 209,570.16, 289,121.40 and 128,973.36

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Solution

The fourth proportional to 209,570.16, 289,121.40 and 128,973.36 is: 177,930.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,570.16 : 289,121.40 = 128,973.36 : x
  2. Step 2: Convert to fraction form
    209,570.16/289,121.40 = 128,973.36/x
  3. Step 3: Cross multiply
    209,570.16x = 289,121.40 × 128,973.36
  4. Step 4: Simplify right side
    209,570.16x = 37,288,958,405.90
  5. Step 5: Solve for x
    x = 37,288,958,405.90/209,570.16
  6. Step 6: Final answer
    x = 177,930.67

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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.