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Finding the Fourth Proportional to 68,605.40, 102,904.99 and 28,607.90

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Solution

The fourth proportional to 68,605.40, 102,904.99 and 28,607.90 is: 42,910.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,605.40 : 102,904.99 = 28,607.90 : x
  2. Step 2: Convert to fraction form
    68,605.40/102,904.99 = 28,607.90/x
  3. Step 3: Cross multiply
    68,605.40x = 102,904.99 × 28,607.90
  4. Step 4: Simplify right side
    68,605.40x = 2,943,895,077.38
  5. Step 5: Solve for x
    x = 2,943,895,077.38/68,605.40
  6. Step 6: Final answer
    x = 42,910.54

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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.