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Finding the Fourth Proportional to 98,616.80, 147,925.20 and 81,995.60

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Solution

The fourth proportional to 98,616.80, 147,925.20 and 81,995.60 is: 122,993.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,616.80 : 147,925.20 = 81,995.60 : x
  2. Step 2: Convert to fraction form
    98,616.80/147,925.20 = 81,995.60/x
  3. Step 3: Cross multiply
    98,616.80x = 147,925.20 × 81,995.60
  4. Step 4: Simplify right side
    98,616.80x = 12,129,215,529.12
  5. Step 5: Solve for x
    x = 12,129,215,529.12/98,616.80
  6. Step 6: Final answer
    x = 122,993.40

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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.