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Finding the Fourth Proportional to 127,809.60, 191,570.40 and 61,281.60

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Solution

The fourth proportional to 127,809.60, 191,570.40 and 61,281.60 is: 91,853.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,809.60 : 191,570.40 = 61,281.60 : x
  2. Step 2: Convert to fraction form
    127,809.60/191,570.40 = 61,281.60/x
  3. Step 3: Cross multiply
    127,809.60x = 191,570.40 × 61,281.60
  4. Step 4: Simplify right side
    127,809.60x = 11,739,740,624.64
  5. Step 5: Solve for x
    x = 11,739,740,624.64/127,809.60
  6. Step 6: Final answer
    x = 91,853.36

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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.