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Finding the Fourth Proportional to 68,488.40, 102,740.79 and 29,040.38

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Solution

The fourth proportional to 68,488.40, 102,740.79 and 29,040.38 is: 43,564.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,488.40 : 102,740.79 = 29,040.38 : x
  2. Step 2: Convert to fraction form
    68,488.40/102,740.79 = 29,040.38/x
  3. Step 3: Cross multiply
    68,488.40x = 102,740.79 × 29,040.38
  4. Step 4: Simplify right side
    68,488.40x = 2,983,631,069.40
  5. Step 5: Solve for x
    x = 2,983,631,069.40/68,488.40
  6. Step 6: Final answer
    x = 43,564.04

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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.