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Finding the Fourth Proportional to 161,803.12, 242,682 and 68,287

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Solution

The fourth proportional to 161,803.12, 242,682 and 68,287 is: 102,420.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,803.12 : 242,682 = 68,287 : x
  2. Step 2: Convert to fraction form
    161,803.12/242,682 = 68,287/x
  3. Step 3: Cross multiply
    161,803.12x = 242,682 × 68,287
  4. Step 4: Simplify right side
    161,803.12x = 16,572,025,734
  5. Step 5: Solve for x
    x = 16,572,025,734/161,803.12
  6. Step 6: Final answer
    x = 102,420.93

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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.