Home / 209,115-288,580.05-113,621.67

Finding the Fourth Proportional to 209,115, 288,580.05 and 113,621.67

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Solution

The fourth proportional to 209,115, 288,580.05 and 113,621.67 is: 156,798.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,115 : 288,580.05 = 113,621.67 : x
  2. Step 2: Convert to fraction form
    209,115/288,580.05 = 113,621.67/x
  3. Step 3: Cross multiply
    209,115x = 288,580.05 × 113,621.67
  4. Step 4: Simplify right side
    209,115x = 32,788,947,209.68
  5. Step 5: Solve for x
    x = 32,788,947,209.68/209,115
  6. Step 6: Final answer
    x = 156,798.64

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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.