Home / 89,626.20-134,439.30-85,689.60

Finding the Fourth Proportional to 89,626.20, 134,439.30 and 85,689.60

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Solution

The fourth proportional to 89,626.20, 134,439.30 and 85,689.60 is: 128,534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,626.20 : 134,439.30 = 85,689.60 : x
  2. Step 2: Convert to fraction form
    89,626.20/134,439.30 = 85,689.60/x
  3. Step 3: Cross multiply
    89,626.20x = 134,439.30 × 85,689.60
  4. Step 4: Simplify right side
    89,626.20x = 11,520,049,841.28
  5. Step 5: Solve for x
    x = 11,520,049,841.28/89,626.20
  6. Step 6: Final answer
    x = 128,534.40

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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.