Home / 115,438.15-172,993.20-80,336.80

Finding the Fourth Proportional to 115,438.15, 172,993.20 and 80,336.80

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Solution

The fourth proportional to 115,438.15, 172,993.20 and 80,336.80 is: 120,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,438.15 : 172,993.20 = 80,336.80 : x
  2. Step 2: Convert to fraction form
    115,438.15/172,993.20 = 80,336.80/x
  3. Step 3: Cross multiply
    115,438.15x = 172,993.20 × 80,336.80
  4. Step 4: Simplify right side
    115,438.15x = 13,897,720,109.76
  5. Step 5: Solve for x
    x = 13,897,720,109.76/115,438.15
  6. Step 6: Final answer
    x = 120,391.05

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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.