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Finding the Fourth Proportional to 89,604.20, 134,479.20 and 86,688.20

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Solution

The fourth proportional to 89,604.20, 134,479.20 and 86,688.20 is: 130,102.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,604.20 : 134,479.20 = 86,688.20 : x
  2. Step 2: Convert to fraction form
    89,604.20/134,479.20 = 86,688.20/x
  3. Step 3: Cross multiply
    89,604.20x = 134,479.20 × 86,688.20
  4. Step 4: Simplify right side
    89,604.20x = 11,657,759,785.44
  5. Step 5: Solve for x
    x = 11,657,759,785.44/89,604.20
  6. Step 6: Final answer
    x = 130,102.83

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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.