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Finding the Fourth Proportional to 163,640.80, 245,331.60 and 89,768.80

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Solution

The fourth proportional to 163,640.80, 245,331.60 and 89,768.80 is: 134,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,640.80 : 245,331.60 = 89,768.80 : x
  2. Step 2: Convert to fraction form
    163,640.80/245,331.60 = 89,768.80/x
  3. Step 3: Cross multiply
    163,640.80x = 245,331.60 × 89,768.80
  4. Step 4: Simplify right side
    163,640.80x = 22,023,123,334.08
  5. Step 5: Solve for x
    x = 22,023,123,334.08/163,640.80
  6. Step 6: Final answer
    x = 134,582.11

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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.