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Finding the Fourth Proportional to 68,470.70, 102,706.05 and 19,216.30

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Solution

The fourth proportional to 68,470.70, 102,706.05 and 19,216.30 is: 28,824.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,470.70 : 102,706.05 = 19,216.30 : x
  2. Step 2: Convert to fraction form
    68,470.70/102,706.05 = 19,216.30/x
  3. Step 3: Cross multiply
    68,470.70x = 102,706.05 × 19,216.30
  4. Step 4: Simplify right side
    68,470.70x = 1,973,630,268.62
  5. Step 5: Solve for x
    x = 1,973,630,268.62/68,470.70
  6. Step 6: Final answer
    x = 28,824.45

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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.