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Finding the Fourth Proportional to 127,991.54, 176,628.40 and 71,402.90

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Solution

The fourth proportional to 127,991.54, 176,628.40 and 71,402.90 is: 98,536.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,991.54 : 176,628.40 = 71,402.90 : x
  2. Step 2: Convert to fraction form
    127,991.54/176,628.40 = 71,402.90/x
  3. Step 3: Cross multiply
    127,991.54x = 176,628.40 × 71,402.90
  4. Step 4: Simplify right side
    127,991.54x = 12,611,779,982.36
  5. Step 5: Solve for x
    x = 12,611,779,982.36/127,991.54
  6. Step 6: Final answer
    x = 98,536.04

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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.