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Finding the Fourth Proportional to 279,957.16, 420,110.70 and 113,745.16

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Solution

The fourth proportional to 279,957.16, 420,110.70 and 113,745.16 is: 170,688.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,957.16 : 420,110.70 = 113,745.16 : x
  2. Step 2: Convert to fraction form
    279,957.16/420,110.70 = 113,745.16/x
  3. Step 3: Cross multiply
    279,957.16x = 420,110.70 × 113,745.16
  4. Step 4: Simplify right side
    279,957.16x = 47,785,558,789.21
  5. Step 5: Solve for x
    x = 47,785,558,789.21/279,957.16
  6. Step 6: Final answer
    x = 170,688.83

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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.