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Finding the Fourth Proportional to 161,640.80, 223,124.16 and 138,888.80

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Solution

The fourth proportional to 161,640.80, 223,124.16 and 138,888.80 is: 191,717.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,640.80 : 223,124.16 = 138,888.80 : x
  2. Step 2: Convert to fraction form
    161,640.80/223,124.16 = 138,888.80/x
  3. Step 3: Cross multiply
    161,640.80x = 223,124.16 × 138,888.80
  4. Step 4: Simplify right side
    161,640.80x = 30,989,446,833.41
  5. Step 5: Solve for x
    x = 30,989,446,833.41/161,640.80
  6. Step 6: Final answer
    x = 191,717.97

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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.