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Finding the Fourth Proportional to 127,999.30, 191,998.95 and 81,304.90

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Solution

The fourth proportional to 127,999.30, 191,998.95 and 81,304.90 is: 121,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,999.30 : 191,998.95 = 81,304.90 : x
  2. Step 2: Convert to fraction form
    127,999.30/191,998.95 = 81,304.90/x
  3. Step 3: Cross multiply
    127,999.30x = 191,998.95 × 81,304.90
  4. Step 4: Simplify right side
    127,999.30x = 15,610,455,429.86
  5. Step 5: Solve for x
    x = 15,610,455,429.86/127,999.30
  6. Step 6: Final answer
    x = 121,957.35

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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.