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Finding the Fourth Proportional to 68,659.60, 103,054.20 and 42,415.60

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Solution

The fourth proportional to 68,659.60, 103,054.20 and 42,415.60 is: 63,663.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,659.60 : 103,054.20 = 42,415.60 : x
  2. Step 2: Convert to fraction form
    68,659.60/103,054.20 = 42,415.60/x
  3. Step 3: Cross multiply
    68,659.60x = 103,054.20 × 42,415.60
  4. Step 4: Simplify right side
    68,659.60x = 4,371,105,725.52
  5. Step 5: Solve for x
    x = 4,371,105,725.52/68,659.60
  6. Step 6: Final answer
    x = 63,663.43

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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.