Home / 209,121.61-313,506.06-90,703.76

Finding the Fourth Proportional to 209,121.61, 313,506.06 and 90,703.76

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Solution

The fourth proportional to 209,121.61, 313,506.06 and 90,703.76 is: 135,979.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,121.61 : 313,506.06 = 90,703.76 : x
  2. Step 2: Convert to fraction form
    209,121.61/313,506.06 = 90,703.76/x
  3. Step 3: Cross multiply
    209,121.61x = 313,506.06 × 90,703.76
  4. Step 4: Simplify right side
    209,121.61x = 28,436,176,857.26
  5. Step 5: Solve for x
    x = 28,436,176,857.26/209,121.61
  6. Step 6: Final answer
    x = 135,979.14

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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.