Home / 76,839.21-115,244.76-20,666.16

Finding the Fourth Proportional to 76,839.21, 115,244.76 and 20,666.16

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Solution

The fourth proportional to 76,839.21, 115,244.76 and 20,666.16 is: 30,995.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,839.21 : 115,244.76 = 20,666.16 : x
  2. Step 2: Convert to fraction form
    76,839.21/115,244.76 = 20,666.16/x
  3. Step 3: Cross multiply
    76,839.21x = 115,244.76 × 20,666.16
  4. Step 4: Simplify right side
    76,839.21x = 2,381,666,649.32
  5. Step 5: Solve for x
    x = 2,381,666,649.32/76,839.21
  6. Step 6: Final answer
    x = 30,995.46

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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.