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Finding the Fourth Proportional to 78,200.01, 117,300.21 and 19,035.60

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Solution

The fourth proportional to 78,200.01, 117,300.21 and 19,035.60 is: 28,553.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,200.01 : 117,300.21 = 19,035.60 : x
  2. Step 2: Convert to fraction form
    78,200.01/117,300.21 = 19,035.60/x
  3. Step 3: Cross multiply
    78,200.01x = 117,300.21 × 19,035.60
  4. Step 4: Simplify right side
    78,200.01x = 2,232,879,877.48
  5. Step 5: Solve for x
    x = 2,232,879,877.48/78,200.01
  6. Step 6: Final answer
    x = 28,553.45

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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.