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Finding the Fourth Proportional to 127,968.80, 191,708.40 and 68,784.80

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Solution

The fourth proportional to 127,968.80, 191,708.40 and 68,784.80 is: 103,045.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,968.80 : 191,708.40 = 68,784.80 : x
  2. Step 2: Convert to fraction form
    127,968.80/191,708.40 = 68,784.80/x
  3. Step 3: Cross multiply
    127,968.80x = 191,708.40 × 68,784.80
  4. Step 4: Simplify right side
    127,968.80x = 13,186,623,952.32
  5. Step 5: Solve for x
    x = 13,186,623,952.32/127,968.80
  6. Step 6: Final answer
    x = 103,045.62

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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.