Home / 128,115.17-192,290.88-64,979.60

Finding the Fourth Proportional to 128,115.17, 192,290.88 and 64,979.60

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Solution

The fourth proportional to 128,115.17, 192,290.88 and 64,979.60 is: 97,529.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,115.17 : 192,290.88 = 64,979.60 : x
  2. Step 2: Convert to fraction form
    128,115.17/192,290.88 = 64,979.60/x
  3. Step 3: Cross multiply
    128,115.17x = 192,290.88 × 64,979.60
  4. Step 4: Simplify right side
    128,115.17x = 12,494,984,466.05
  5. Step 5: Solve for x
    x = 12,494,984,466.05/128,115.17
  6. Step 6: Final answer
    x = 97,529.31

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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.