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Finding the Fourth Proportional to 163,539.88, 225,705.90 and 99,864.28

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Solution

The fourth proportional to 163,539.88, 225,705.90 and 99,864.28 is: 137,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,539.88 : 225,705.90 = 99,864.28 : x
  2. Step 2: Convert to fraction form
    163,539.88/225,705.90 = 99,864.28/x
  3. Step 3: Cross multiply
    163,539.88x = 225,705.90 × 99,864.28
  4. Step 4: Simplify right side
    163,539.88x = 22,539,957,195.25
  5. Step 5: Solve for x
    x = 22,539,957,195.25/163,539.88
  6. Step 6: Final answer
    x = 137,825.45

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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.