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Finding the Fourth Proportional to 68,780.75, 103,200.28 and 37,579.55

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Solution

The fourth proportional to 68,780.75, 103,200.28 and 37,579.55 is: 56,385.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,780.75 : 103,200.28 = 37,579.55 : x
  2. Step 2: Convert to fraction form
    68,780.75/103,200.28 = 37,579.55/x
  3. Step 3: Cross multiply
    68,780.75x = 103,200.28 × 37,579.55
  4. Step 4: Simplify right side
    68,780.75x = 3,878,219,472.32
  5. Step 5: Solve for x
    x = 3,878,219,472.32/68,780.75
  6. Step 6: Final answer
    x = 56,385.25

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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.