Home / 76,515.75-114,780.24-21,111.75

Finding the Fourth Proportional to 76,515.75, 114,780.24 and 21,111.75

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Solution

The fourth proportional to 76,515.75, 114,780.24 and 21,111.75 is: 31,669.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,515.75 : 114,780.24 = 21,111.75 : x
  2. Step 2: Convert to fraction form
    76,515.75/114,780.24 = 21,111.75/x
  3. Step 3: Cross multiply
    76,515.75x = 114,780.24 × 21,111.75
  4. Step 4: Simplify right side
    76,515.75x = 2,423,211,731.82
  5. Step 5: Solve for x
    x = 2,423,211,731.82/76,515.75
  6. Step 6: Final answer
    x = 31,669.45

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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.