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Finding the Fourth Proportional to 221,093.52, 331,710.40 and 78,935.68

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Solution

The fourth proportional to 221,093.52, 331,710.40 and 78,935.68 is: 118,428.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,093.52 : 331,710.40 = 78,935.68 : x
  2. Step 2: Convert to fraction form
    221,093.52/331,710.40 = 78,935.68/x
  3. Step 3: Cross multiply
    221,093.52x = 331,710.40 × 78,935.68
  4. Step 4: Simplify right side
    221,093.52x = 26,183,785,987.07
  5. Step 5: Solve for x
    x = 26,183,785,987.07/221,093.52
  6. Step 6: Final answer
    x = 118,428.55

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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.