Home / 209,130.73-313,519.75-90,712.91

Finding the Fourth Proportional to 209,130.73, 313,519.75 and 90,712.91

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Solution

The fourth proportional to 209,130.73, 313,519.75 and 90,712.91 is: 135,992.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,130.73 : 313,519.75 = 90,712.91 : x
  2. Step 2: Convert to fraction form
    209,130.73/313,519.75 = 90,712.91/x
  3. Step 3: Cross multiply
    209,130.73x = 313,519.75 × 90,712.91
  4. Step 4: Simplify right side
    209,130.73x = 28,440,289,421.99
  5. Step 5: Solve for x
    x = 28,440,289,421.99/209,130.73
  6. Step 6: Final answer
    x = 135,992.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.