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Finding the Fourth Proportional to 68,355.52, 94,330.50 and 38,139

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Solution

The fourth proportional to 68,355.52, 94,330.50 and 38,139 is: 52,631.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,355.52 : 94,330.50 = 38,139 : x
  2. Step 2: Convert to fraction form
    68,355.52/94,330.50 = 38,139/x
  3. Step 3: Cross multiply
    68,355.52x = 94,330.50 × 38,139
  4. Step 4: Simplify right side
    68,355.52x = 3,597,670,939.50
  5. Step 5: Solve for x
    x = 3,597,670,939.50/68,355.52
  6. Step 6: Final answer
    x = 52,631.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.