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Finding the Fourth Proportional to 153,896.90, 230,320.20 and 128,965.10

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Solution

The fourth proportional to 153,896.90, 230,320.20 and 128,965.10 is: 193,007.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,896.90 : 230,320.20 = 128,965.10 : x
  2. Step 2: Convert to fraction form
    153,896.90/230,320.20 = 128,965.10/x
  3. Step 3: Cross multiply
    153,896.90x = 230,320.20 × 128,965.10
  4. Step 4: Simplify right side
    153,896.90x = 29,703,267,625.02
  5. Step 5: Solve for x
    x = 29,703,267,625.02/153,896.90
  6. Step 6: Final answer
    x = 193,007.58

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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.