Home / 85,419.24-128,129.10-50,310.60

Finding the Fourth Proportional to 85,419.24, 128,129.10 and 50,310.60

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Solution

The fourth proportional to 85,419.24, 128,129.10 and 50,310.60 is: 75,466.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,419.24 : 128,129.10 = 50,310.60 : x
  2. Step 2: Convert to fraction form
    85,419.24/128,129.10 = 50,310.60/x
  3. Step 3: Cross multiply
    85,419.24x = 128,129.10 × 50,310.60
  4. Step 4: Simplify right side
    85,419.24x = 6,446,251,898.46
  5. Step 5: Solve for x
    x = 6,446,251,898.46/85,419.24
  6. Step 6: Final answer
    x = 75,466.04

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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.