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Finding the Fourth Proportional to 68,320.68, 102,484.16 and 20,932.38

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Solution

The fourth proportional to 68,320.68, 102,484.16 and 20,932.38 is: 31,399.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,320.68 : 102,484.16 = 20,932.38 : x
  2. Step 2: Convert to fraction form
    68,320.68/102,484.16 = 20,932.38/x
  3. Step 3: Cross multiply
    68,320.68x = 102,484.16 × 20,932.38
  4. Step 4: Simplify right side
    68,320.68x = 2,145,237,381.10
  5. Step 5: Solve for x
    x = 2,145,237,381.10/68,320.68
  6. Step 6: Final answer
    x = 31,399.53

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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.