Home / 85,835.20-128,709.60-50,785.60

Finding the Fourth Proportional to 85,835.20, 128,709.60 and 50,785.60

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Solution

The fourth proportional to 85,835.20, 128,709.60 and 50,785.60 is: 76,152.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,835.20 : 128,709.60 = 50,785.60 : x
  2. Step 2: Convert to fraction form
    85,835.20/128,709.60 = 50,785.60/x
  3. Step 3: Cross multiply
    85,835.20x = 128,709.60 × 50,785.60
  4. Step 4: Simplify right side
    85,835.20x = 6,536,594,261.76
  5. Step 5: Solve for x
    x = 6,536,594,261.76/85,835.20
  6. Step 6: Final answer
    x = 76,152.84

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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.