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Finding the Fourth Proportional to 92,318.40, 138,542.40 and 39,765.60

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Solution

The fourth proportional to 92,318.40, 138,542.40 and 39,765.60 is: 59,676.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,318.40 : 138,542.40 = 39,765.60 : x
  2. Step 2: Convert to fraction form
    92,318.40/138,542.40 = 39,765.60/x
  3. Step 3: Cross multiply
    92,318.40x = 138,542.40 × 39,765.60
  4. Step 4: Simplify right side
    92,318.40x = 5,509,221,661.44
  5. Step 5: Solve for x
    x = 5,509,221,661.44/92,318.40
  6. Step 6: Final answer
    x = 59,676.31

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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.