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Finding the Fourth Proportional to 76,125.88, 114,190.26 and 20,721.88

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Solution

The fourth proportional to 76,125.88, 114,190.26 and 20,721.88 is: 31,083.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,125.88 : 114,190.26 = 20,721.88 : x
  2. Step 2: Convert to fraction form
    76,125.88/114,190.26 = 20,721.88/x
  3. Step 3: Cross multiply
    76,125.88x = 114,190.26 × 20,721.88
  4. Step 4: Simplify right side
    76,125.88x = 2,366,236,864.89
  5. Step 5: Solve for x
    x = 2,366,236,864.89/76,125.88
  6. Step 6: Final answer
    x = 31,083.21

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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.