Home / 77,990.31-116,990.33-31,237.11

Finding the Fourth Proportional to 77,990.31, 116,990.33 and 31,237.11

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Solution

The fourth proportional to 77,990.31, 116,990.33 and 31,237.11 is: 46,857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,990.31 : 116,990.33 = 31,237.11 : x
  2. Step 2: Convert to fraction form
    77,990.31/116,990.33 = 31,237.11/x
  3. Step 3: Cross multiply
    77,990.31x = 116,990.33 × 31,237.11
  4. Step 4: Simplify right side
    77,990.31x = 3,654,439,650.96
  5. Step 5: Solve for x
    x = 3,654,439,650.96/77,990.31
  6. Step 6: Final answer
    x = 46,857.61

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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.