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Finding the Fourth Proportional to 127,291.60, 190,879.80 and 57,134.80

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Solution

The fourth proportional to 127,291.60, 190,879.80 and 57,134.80 is: 85,676.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,291.60 : 190,879.80 = 57,134.80 : x
  2. Step 2: Convert to fraction form
    127,291.60/190,879.80 = 57,134.80/x
  3. Step 3: Cross multiply
    127,291.60x = 190,879.80 × 57,134.80
  4. Step 4: Simplify right side
    127,291.60x = 10,905,879,197.04
  5. Step 5: Solve for x
    x = 10,905,879,197.04/127,291.60
  6. Step 6: Final answer
    x = 85,676.35

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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.