Home / 115,439.15-172,994.70-80,337.80

Finding the Fourth Proportional to 115,439.15, 172,994.70 and 80,337.80

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Solution

The fourth proportional to 115,439.15, 172,994.70 and 80,337.80 is: 120,392.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,439.15 : 172,994.70 = 80,337.80 : x
  2. Step 2: Convert to fraction form
    115,439.15/172,994.70 = 80,337.80/x
  3. Step 3: Cross multiply
    115,439.15x = 172,994.70 × 80,337.80
  4. Step 4: Simplify right side
    115,439.15x = 13,898,013,609.66
  5. Step 5: Solve for x
    x = 13,898,013,609.66/115,439.15
  6. Step 6: Final answer
    x = 120,392.55

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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.