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Finding the Fourth Proportional to 68,043.16, 102,076.98 and 28,039.87

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Solution

The fourth proportional to 68,043.16, 102,076.98 and 28,039.87 is: 42,064.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,043.16 : 102,076.98 = 28,039.87 : x
  2. Step 2: Convert to fraction form
    68,043.16/102,076.98 = 28,039.87/x
  3. Step 3: Cross multiply
    68,043.16x = 102,076.98 × 28,039.87
  4. Step 4: Simplify right side
    68,043.16x = 2,862,225,249.19
  5. Step 5: Solve for x
    x = 2,862,225,249.19/68,043.16
  6. Step 6: Final answer
    x = 42,064.85

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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.