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Finding the Fourth Proportional to 78,100.01, 117,148.98 and 18,936.22

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Solution

The fourth proportional to 78,100.01, 117,148.98 and 18,936.22 is: 28,404.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,100.01 : 117,148.98 = 18,936.22 : x
  2. Step 2: Convert to fraction form
    78,100.01/117,148.98 = 18,936.22/x
  3. Step 3: Cross multiply
    78,100.01x = 117,148.98 × 18,936.22
  4. Step 4: Simplify right side
    78,100.01x = 2,218,358,858.06
  5. Step 5: Solve for x
    x = 2,218,358,858.06/78,100.01
  6. Step 6: Final answer
    x = 28,404.08

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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.