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Finding the Fourth Proportional to 68,470.85, 102,640.67 and 28,973.63

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Solution

The fourth proportional to 68,470.85, 102,640.67 and 28,973.63 is: 43,432.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,470.85 : 102,640.67 = 28,973.63 : x
  2. Step 2: Convert to fraction form
    68,470.85/102,640.67 = 28,973.63/x
  3. Step 3: Cross multiply
    68,470.85x = 102,640.67 × 28,973.63
  4. Step 4: Simplify right side
    68,470.85x = 2,973,872,650.66
  5. Step 5: Solve for x
    x = 2,973,872,650.66/68,470.85
  6. Step 6: Final answer
    x = 43,432.68

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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.