Home / 89,646.20-134,469.30-85,709.60

Finding the Fourth Proportional to 89,646.20, 134,469.30 and 85,709.60

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Solution

The fourth proportional to 89,646.20, 134,469.30 and 85,709.60 is: 128,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,646.20 : 134,469.30 = 85,709.60 : x
  2. Step 2: Convert to fraction form
    89,646.20/134,469.30 = 85,709.60/x
  3. Step 3: Cross multiply
    89,646.20x = 134,469.30 × 85,709.60
  4. Step 4: Simplify right side
    89,646.20x = 11,525,309,915.28
  5. Step 5: Solve for x
    x = 11,525,309,915.28/89,646.20
  6. Step 6: Final answer
    x = 128,564.40

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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.