Home / 68,075.20-102,112.86-21,331.72

Finding the Fourth Proportional to 68,075.20, 102,112.86 and 21,331.72

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Solution

The fourth proportional to 68,075.20, 102,112.86 and 21,331.72 is: 31,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,075.20 : 102,112.86 = 21,331.72 : x
  2. Step 2: Convert to fraction form
    68,075.20/102,112.86 = 21,331.72/x
  3. Step 3: Cross multiply
    68,075.20x = 102,112.86 × 21,331.72
  4. Step 4: Simplify right side
    68,075.20x = 2,178,242,937.92
  5. Step 5: Solve for x
    x = 2,178,242,937.92/68,075.20
  6. Step 6: Final answer
    x = 31,997.60

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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.