Home / 77,712.92-116,555.16-20,787.56

Finding the Fourth Proportional to 77,712.92, 116,555.16 and 20,787.56

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Solution

The fourth proportional to 77,712.92, 116,555.16 and 20,787.56 is: 31,177.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,712.92 : 116,555.16 = 20,787.56 : x
  2. Step 2: Convert to fraction form
    77,712.92/116,555.16 = 20,787.56/x
  3. Step 3: Cross multiply
    77,712.92x = 116,555.16 × 20,787.56
  4. Step 4: Simplify right side
    77,712.92x = 2,422,897,381.81
  5. Step 5: Solve for x
    x = 2,422,897,381.81/77,712.92
  6. Step 6: Final answer
    x = 31,177.54

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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.