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Finding the Fourth Proportional to 68,508.86, 102,753.92 and 20,476.80

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Solution

The fourth proportional to 68,508.86, 102,753.92 and 20,476.80 is: 30,712.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,508.86 : 102,753.92 = 20,476.80 : x
  2. Step 2: Convert to fraction form
    68,508.86/102,753.92 = 20,476.80/x
  3. Step 3: Cross multiply
    68,508.86x = 102,753.92 × 20,476.80
  4. Step 4: Simplify right side
    68,508.86x = 2,104,071,405.07
  5. Step 5: Solve for x
    x = 2,104,071,405.07/68,508.86
  6. Step 6: Final answer
    x = 30,712.40

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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.