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Finding the Fourth Proportional to 102,429.80, 153,644.70 and 68,604.20

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Solution

The fourth proportional to 102,429.80, 153,644.70 and 68,604.20 is: 102,906.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,429.80 : 153,644.70 = 68,604.20 : x
  2. Step 2: Convert to fraction form
    102,429.80/153,644.70 = 68,604.20/x
  3. Step 3: Cross multiply
    102,429.80x = 153,644.70 × 68,604.20
  4. Step 4: Simplify right side
    102,429.80x = 10,540,671,727.74
  5. Step 5: Solve for x
    x = 10,540,671,727.74/102,429.80
  6. Step 6: Final answer
    x = 102,906.30

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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.