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Finding the Fourth Proportional to 163,354.16, 225,453.12 and 99,728.84

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Solution

The fourth proportional to 163,354.16, 225,453.12 and 99,728.84 is: 137,640.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,354.16 : 225,453.12 = 99,728.84 : x
  2. Step 2: Convert to fraction form
    163,354.16/225,453.12 = 99,728.84/x
  3. Step 3: Cross multiply
    163,354.16x = 225,453.12 × 99,728.84
  4. Step 4: Simplify right side
    163,354.16x = 22,484,178,131.98
  5. Step 5: Solve for x
    x = 22,484,178,131.98/163,354.16
  6. Step 6: Final answer
    x = 137,640.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.