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Finding the Fourth Proportional to 68,671.40, 102,923.91 and 29,145.51

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Solution

The fourth proportional to 68,671.40, 102,923.91 and 29,145.51 is: 43,682.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,671.40 : 102,923.91 = 29,145.51 : x
  2. Step 2: Convert to fraction form
    68,671.40/102,923.91 = 29,145.51/x
  3. Step 3: Cross multiply
    68,671.40x = 102,923.91 × 29,145.51
  4. Step 4: Simplify right side
    68,671.40x = 2,999,769,848.14
  5. Step 5: Solve for x
    x = 2,999,769,848.14/68,671.40
  6. Step 6: Final answer
    x = 43,682.96

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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.