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Finding the Fourth Proportional to 68,706.49, 103,043.15 and 28,703.86

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Solution

The fourth proportional to 68,706.49, 103,043.15 and 28,703.86 is: 43,048.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,706.49 : 103,043.15 = 28,703.86 : x
  2. Step 2: Convert to fraction form
    68,706.49/103,043.15 = 28,703.86/x
  3. Step 3: Cross multiply
    68,706.49x = 103,043.15 × 28,703.86
  4. Step 4: Simplify right side
    68,706.49x = 2,957,735,492.82
  5. Step 5: Solve for x
    x = 2,957,735,492.82/68,706.49
  6. Step 6: Final answer
    x = 43,048.85

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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.