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Finding the Fourth Proportional to 128,991.98, 193,543.41 and 66,706.22

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Solution

The fourth proportional to 128,991.98, 193,543.41 and 66,706.22 is: 100,088.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,991.98 : 193,543.41 = 66,706.22 : x
  2. Step 2: Convert to fraction form
    128,991.98/193,543.41 = 66,706.22/x
  3. Step 3: Cross multiply
    128,991.98x = 193,543.41 × 66,706.22
  4. Step 4: Simplify right side
    128,991.98x = 12,910,549,287.01
  5. Step 5: Solve for x
    x = 12,910,549,287.01/128,991.98
  6. Step 6: Final answer
    x = 100,088.00

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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.