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Finding the Fourth Proportional to 243,138.66, 364,737.08 and 74,636.84

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Solution

The fourth proportional to 243,138.66, 364,737.08 and 74,636.84 is: 111,964.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,138.66 : 364,737.08 = 74,636.84 : x
  2. Step 2: Convert to fraction form
    243,138.66/364,737.08 = 74,636.84/x
  3. Step 3: Cross multiply
    243,138.66x = 364,737.08 × 74,636.84
  4. Step 4: Simplify right side
    243,138.66x = 27,222,823,760.63
  5. Step 5: Solve for x
    x = 27,222,823,760.63/243,138.66
  6. Step 6: Final answer
    x = 111,964.19

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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.