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Finding the Fourth Proportional to 85,884.60, 128,826.90 and 50,806.20

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Solution

The fourth proportional to 85,884.60, 128,826.90 and 50,806.20 is: 76,209.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,884.60 : 128,826.90 = 50,806.20 : x
  2. Step 2: Convert to fraction form
    85,884.60/128,826.90 = 50,806.20/x
  3. Step 3: Cross multiply
    85,884.60x = 128,826.90 × 50,806.20
  4. Step 4: Simplify right side
    85,884.60x = 6,545,205,246.78
  5. Step 5: Solve for x
    x = 6,545,205,246.78/85,884.60
  6. Step 6: Final answer
    x = 76,209.30

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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.