Home / 209,149.81-313,548.40-90,731.86

Finding the Fourth Proportional to 209,149.81, 313,548.40 and 90,731.86

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Solution

The fourth proportional to 209,149.81, 313,548.40 and 90,731.86 is: 136,021.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,149.81 : 313,548.40 = 90,731.86 : x
  2. Step 2: Convert to fraction form
    209,149.81/313,548.40 = 90,731.86/x
  3. Step 3: Cross multiply
    209,149.81x = 313,548.40 × 90,731.86
  4. Step 4: Simplify right side
    209,149.81x = 28,448,828,861.57
  5. Step 5: Solve for x
    x = 28,448,828,861.57/209,149.81
  6. Step 6: Final answer
    x = 136,021.30

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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.