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Finding the Fourth Proportional to 76,805.53, 115,227.74 and 21,401.53

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Solution

The fourth proportional to 76,805.53, 115,227.74 and 21,401.53 is: 32,107.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,805.53 : 115,227.74 = 21,401.53 : x
  2. Step 2: Convert to fraction form
    76,805.53/115,227.74 = 21,401.53/x
  3. Step 3: Cross multiply
    76,805.53x = 115,227.74 × 21,401.53
  4. Step 4: Simplify right side
    76,805.53x = 2,466,050,051.72
  5. Step 5: Solve for x
    x = 2,466,050,051.72/76,805.53
  6. Step 6: Final answer
    x = 32,107.71

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1.5x scale

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.