Home / 209,289.09-313,926.61-90,960.42

Finding the Fourth Proportional to 209,289.09, 313,926.61 and 90,960.42

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Solution

The fourth proportional to 209,289.09, 313,926.61 and 90,960.42 is: 136,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,289.09 : 313,926.61 = 90,960.42 : x
  2. Step 2: Convert to fraction form
    209,289.09/313,926.61 = 90,960.42/x
  3. Step 3: Cross multiply
    209,289.09x = 313,926.61 × 90,960.42
  4. Step 4: Simplify right side
    209,289.09x = 28,554,896,294.78
  5. Step 5: Solve for x
    x = 28,554,896,294.78/209,289.09
  6. Step 6: Final answer
    x = 136,437.58

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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.