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Finding the Fourth Proportional to 103,695.10, 155,153.85 and 68,703.10

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Solution

The fourth proportional to 103,695.10, 155,153.85 and 68,703.10 is: 102,797.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,695.10 : 155,153.85 = 68,703.10 : x
  2. Step 2: Convert to fraction form
    103,695.10/155,153.85 = 68,703.10/x
  3. Step 3: Cross multiply
    103,695.10x = 155,153.85 × 68,703.10
  4. Step 4: Simplify right side
    103,695.10x = 10,659,550,471.94
  5. Step 5: Solve for x
    x = 10,659,550,471.94/103,695.10
  6. Step 6: Final answer
    x = 102,797.05

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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.