Home / 78,439.73-117,707.89-31,046.76

Finding the Fourth Proportional to 78,439.73, 117,707.89 and 31,046.76

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Solution

The fourth proportional to 78,439.73, 117,707.89 and 31,046.76 is: 46,589.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.73 : 117,707.89 = 31,046.76 : x
  2. Step 2: Convert to fraction form
    78,439.73/117,707.89 = 31,046.76/x
  3. Step 3: Cross multiply
    78,439.73x = 117,707.89 × 31,046.76
  4. Step 4: Simplify right side
    78,439.73x = 3,654,448,022.40
  5. Step 5: Solve for x
    x = 3,654,448,022.40/78,439.73
  6. Step 6: Final answer
    x = 46,589.25

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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.