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Finding the Fourth Proportional to 127,511.60, 190,975.80 and 65,109.20

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Solution

The fourth proportional to 127,511.60, 190,975.80 and 65,109.20 is: 97,514.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,511.60 : 190,975.80 = 65,109.20 : x
  2. Step 2: Convert to fraction form
    127,511.60/190,975.80 = 65,109.20/x
  3. Step 3: Cross multiply
    127,511.60x = 190,975.80 × 65,109.20
  4. Step 4: Simplify right side
    127,511.60x = 12,434,281,557.36
  5. Step 5: Solve for x
    x = 12,434,281,557.36/127,511.60
  6. Step 6: Final answer
    x = 97,514.90

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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.