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Finding the Fourth Proportional to 127,551.20, 191,326.80 and 76,812.80

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Solution

The fourth proportional to 127,551.20, 191,326.80 and 76,812.80 is: 115,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,551.20 : 191,326.80 = 76,812.80 : x
  2. Step 2: Convert to fraction form
    127,551.20/191,326.80 = 76,812.80/x
  3. Step 3: Cross multiply
    127,551.20x = 191,326.80 × 76,812.80
  4. Step 4: Simplify right side
    127,551.20x = 14,696,347,223.04
  5. Step 5: Solve for x
    x = 14,696,347,223.04/127,551.20
  6. Step 6: Final answer
    x = 115,219.20

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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.