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Finding the Fourth Proportional to 68,265.76, 102,415.90 and 19,017.76

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Solution

The fourth proportional to 68,265.76, 102,415.90 and 19,017.76 is: 28,531.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,265.76 : 102,415.90 = 19,017.76 : x
  2. Step 2: Convert to fraction form
    68,265.76/102,415.90 = 19,017.76/x
  3. Step 3: Cross multiply
    68,265.76x = 102,415.90 × 19,017.76
  4. Step 4: Simplify right side
    68,265.76x = 1,947,721,006.38
  5. Step 5: Solve for x
    x = 1,947,721,006.38/68,265.76
  6. Step 6: Final answer
    x = 28,531.45

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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.