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Finding the Fourth Proportional to 68,750.24, 103,124.52 and 18,830.30

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Solution

The fourth proportional to 68,750.24, 103,124.52 and 18,830.30 is: 28,245.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,750.24 : 103,124.52 = 18,830.30 : x
  2. Step 2: Convert to fraction form
    68,750.24/103,124.52 = 18,830.30/x
  3. Step 3: Cross multiply
    68,750.24x = 103,124.52 × 18,830.30
  4. Step 4: Simplify right side
    68,750.24x = 1,941,865,133.33
  5. Step 5: Solve for x
    x = 1,941,865,133.33/68,750.24
  6. Step 6: Final answer
    x = 28,245.21

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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.