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Finding the Fourth Proportional to 68,173.49, 102,264.17 and 20,790.20

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Solution

The fourth proportional to 68,173.49, 102,264.17 and 20,790.20 is: 31,186.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,173.49 : 102,264.17 = 20,790.20 : x
  2. Step 2: Convert to fraction form
    68,173.49/102,264.17 = 20,790.20/x
  3. Step 3: Cross multiply
    68,173.49x = 102,264.17 × 20,790.20
  4. Step 4: Simplify right side
    68,173.49x = 2,126,092,776.81
  5. Step 5: Solve for x
    x = 2,126,092,776.81/68,173.49
  6. Step 6: Final answer
    x = 31,186.50

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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.