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Finding the Fourth Proportional to 68,640.84, 102,793.59 and 42,309.36

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Solution

The fourth proportional to 68,640.84, 102,793.59 and 42,309.36 is: 63,360.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,640.84 : 102,793.59 = 42,309.36 : x
  2. Step 2: Convert to fraction form
    68,640.84/102,793.59 = 42,309.36/x
  3. Step 3: Cross multiply
    68,640.84x = 102,793.59 × 42,309.36
  4. Step 4: Simplify right side
    68,640.84x = 4,349,131,005.00
  5. Step 5: Solve for x
    x = 4,349,131,005.00/68,640.84
  6. Step 6: Final answer
    x = 63,360.69

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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.