Home / 130,105.79-179,480.20-87,087.09

Finding the Fourth Proportional to 130,105.79, 179,480.20 and 87,087.09

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Solution

The fourth proportional to 130,105.79, 179,480.20 and 87,087.09 is: 120,136.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,105.79 : 179,480.20 = 87,087.09 : x
  2. Step 2: Convert to fraction form
    130,105.79/179,480.20 = 87,087.09/x
  3. Step 3: Cross multiply
    130,105.79x = 179,480.20 × 87,087.09
  4. Step 4: Simplify right side
    130,105.79x = 15,630,408,330.62
  5. Step 5: Solve for x
    x = 15,630,408,330.62/130,105.79
  6. Step 6: Final answer
    x = 120,136.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.