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Finding the Fourth Proportional to 172,336.80, 258,541.56 and 86,996.28

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Solution

The fourth proportional to 172,336.80, 258,541.56 and 86,996.28 is: 130,512.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,336.80 : 258,541.56 = 86,996.28 : x
  2. Step 2: Convert to fraction form
    172,336.80/258,541.56 = 86,996.28/x
  3. Step 3: Cross multiply
    172,336.80x = 258,541.56 × 86,996.28
  4. Step 4: Simplify right side
    172,336.80x = 22,492,153,945.40
  5. Step 5: Solve for x
    x = 22,492,153,945.40/172,336.80
  6. Step 6: Final answer
    x = 130,512.77

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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.