Home / 68,138.08-102,211.45-21,392.80

Finding the Fourth Proportional to 68,138.08, 102,211.45 and 21,392.80

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Solution

The fourth proportional to 68,138.08, 102,211.45 and 21,392.80 is: 32,090.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,138.08 : 102,211.45 = 21,392.80 : x
  2. Step 2: Convert to fraction form
    68,138.08/102,211.45 = 21,392.80/x
  3. Step 3: Cross multiply
    68,138.08x = 102,211.45 × 21,392.80
  4. Step 4: Simplify right side
    68,138.08x = 2,186,588,798.55
  5. Step 5: Solve for x
    x = 2,186,588,798.55/68,138.08
  6. Step 6: Final answer
    x = 32,090.56

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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.