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Finding the Fourth Proportional to 68,673.16, 103,025.80 and 21,285.77

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Solution

The fourth proportional to 68,673.16, 103,025.80 and 21,285.77 is: 31,933.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,673.16 : 103,025.80 = 21,285.77 : x
  2. Step 2: Convert to fraction form
    68,673.16/103,025.80 = 21,285.77/x
  3. Step 3: Cross multiply
    68,673.16x = 103,025.80 × 21,285.77
  4. Step 4: Simplify right side
    68,673.16x = 2,192,983,482.87
  5. Step 5: Solve for x
    x = 2,192,983,482.87/68,673.16
  6. Step 6: Final answer
    x = 31,933.63

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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.