Home / 130,500.12-180,164.78-85,917.72

Finding the Fourth Proportional to 130,500.12, 180,164.78 and 85,917.72

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Solution

The fourth proportional to 130,500.12, 180,164.78 and 85,917.72 is: 118,615.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,500.12 : 180,164.78 = 85,917.72 : x
  2. Step 2: Convert to fraction form
    130,500.12/180,164.78 = 85,917.72/x
  3. Step 3: Cross multiply
    130,500.12x = 180,164.78 × 85,917.72
  4. Step 4: Simplify right side
    130,500.12x = 15,479,347,121.90
  5. Step 5: Solve for x
    x = 15,479,347,121.90/130,500.12
  6. Step 6: Final answer
    x = 118,615.58

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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.