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Finding the Fourth Proportional to 278,349.82, 417,521.08 and 67,989.58

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Solution

The fourth proportional to 278,349.82, 417,521.08 and 67,989.58 is: 101,983.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,349.82 : 417,521.08 = 67,989.58 : x
  2. Step 2: Convert to fraction form
    278,349.82/417,521.08 = 67,989.58/x
  3. Step 3: Cross multiply
    278,349.82x = 417,521.08 × 67,989.58
  4. Step 4: Simplify right side
    278,349.82x = 28,387,081,911.53
  5. Step 5: Solve for x
    x = 28,387,081,911.53/278,349.82
  6. Step 6: Final answer
    x = 101,983.48

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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.