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Finding the Fourth Proportional to 85,370.40, 127,796.40 and 76,039.20

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Solution

The fourth proportional to 85,370.40, 127,796.40 and 76,039.20 is: 113,827.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,370.40 : 127,796.40 = 76,039.20 : x
  2. Step 2: Convert to fraction form
    85,370.40/127,796.40 = 76,039.20/x
  3. Step 3: Cross multiply
    85,370.40x = 127,796.40 × 76,039.20
  4. Step 4: Simplify right side
    85,370.40x = 9,717,536,018.88
  5. Step 5: Solve for x
    x = 9,717,536,018.88/85,370.40
  6. Step 6: Final answer
    x = 113,827.93

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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.