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Finding the Fourth Proportional to 68,603.15, 102,901.61 and 28,605.65

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Solution

The fourth proportional to 68,603.15, 102,901.61 and 28,605.65 is: 42,907.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,603.15 : 102,901.61 = 28,605.65 : x
  2. Step 2: Convert to fraction form
    68,603.15/102,901.61 = 28,605.65/x
  3. Step 3: Cross multiply
    68,603.15x = 102,901.61 × 28,605.65
  4. Step 4: Simplify right side
    68,603.15x = 2,943,566,997.10
  5. Step 5: Solve for x
    x = 2,943,566,997.10/68,603.15
  6. Step 6: Final answer
    x = 42,907.17

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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.