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Finding the Fourth Proportional to 68,331.96, 102,513.12 and 20,953.68

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Solution

The fourth proportional to 68,331.96, 102,513.12 and 20,953.68 is: 31,435.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,331.96 : 102,513.12 = 20,953.68 : x
  2. Step 2: Convert to fraction form
    68,331.96/102,513.12 = 20,953.68/x
  3. Step 3: Cross multiply
    68,331.96x = 102,513.12 × 20,953.68
  4. Step 4: Simplify right side
    68,331.96x = 2,148,027,112.28
  5. Step 5: Solve for x
    x = 2,148,027,112.28/68,331.96
  6. Step 6: Final answer
    x = 31,435.17

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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.