Home / 78,678.14-117,933.15-31,227.53

Finding the Fourth Proportional to 78,678.14, 117,933.15 and 31,227.53

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Solution

The fourth proportional to 78,678.14, 117,933.15 and 31,227.53 is: 46,807.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678.14 : 117,933.15 = 31,227.53 : x
  2. Step 2: Convert to fraction form
    78,678.14/117,933.15 = 31,227.53/x
  3. Step 3: Cross multiply
    78,678.14x = 117,933.15 × 31,227.53
  4. Step 4: Simplify right side
    78,678.14x = 3,682,760,979.62
  5. Step 5: Solve for x
    x = 3,682,760,979.62/78,678.14
  6. Step 6: Final answer
    x = 46,807.93

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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.