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Finding the Fourth Proportional to 79,365.40, 119,046.80 and 31,979.34

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Solution

The fourth proportional to 79,365.40, 119,046.80 and 31,979.34 is: 47,968.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,365.40 : 119,046.80 = 31,979.34 : x
  2. Step 2: Convert to fraction form
    79,365.40/119,046.80 = 31,979.34/x
  3. Step 3: Cross multiply
    79,365.40x = 119,046.80 × 31,979.34
  4. Step 4: Simplify right side
    79,365.40x = 3,807,037,993.18
  5. Step 5: Solve for x
    x = 3,807,037,993.18/79,365.40
  6. Step 6: Final answer
    x = 47,968.48

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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.