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Finding the Fourth Proportional to 99,189, 136,825.20 and 58,862.88

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Solution

The fourth proportional to 99,189, 136,825.20 and 58,862.88 is: 81,197.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,189 : 136,825.20 = 58,862.88 : x
  2. Step 2: Convert to fraction form
    99,189/136,825.20 = 58,862.88/x
  3. Step 3: Cross multiply
    99,189x = 136,825.20 × 58,862.88
  4. Step 4: Simplify right side
    99,189x = 8,053,925,328.58
  5. Step 5: Solve for x
    x = 8,053,925,328.58/99,189
  6. Step 6: Final answer
    x = 81,197.77

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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.