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Finding the Fourth Proportional to 161,143.48, 241,797.12 and 72,378.88

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Solution

The fourth proportional to 161,143.48, 241,797.12 and 72,378.88 is: 108,605.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,143.48 : 241,797.12 = 72,378.88 : x
  2. Step 2: Convert to fraction form
    161,143.48/241,797.12 = 72,378.88/x
  3. Step 3: Cross multiply
    161,143.48x = 241,797.12 × 72,378.88
  4. Step 4: Simplify right side
    161,143.48x = 17,501,004,732.83
  5. Step 5: Solve for x
    x = 17,501,004,732.83/161,143.48
  6. Step 6: Final answer
    x = 108,605.11

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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.