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Finding the Fourth Proportional to 243,356.05, 364,972.46 and 72,538.34

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Solution

The fourth proportional to 243,356.05, 364,972.46 and 72,538.34 is: 108,789.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,356.05 : 364,972.46 = 72,538.34 : x
  2. Step 2: Convert to fraction form
    243,356.05/364,972.46 = 72,538.34/x
  3. Step 3: Cross multiply
    243,356.05x = 364,972.46 × 72,538.34
  4. Step 4: Simplify right side
    243,356.05x = 26,474,496,943.86
  5. Step 5: Solve for x
    x = 26,474,496,943.86/243,356.05
  6. Step 6: Final answer
    x = 108,789.15

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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.