Home / 138,816.54-208,240.92-67,688.64

Finding the Fourth Proportional to 138,816.54, 208,240.92 and 67,688.64

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Solution

The fourth proportional to 138,816.54, 208,240.92 and 67,688.64 is: 101,540.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,816.54 : 208,240.92 = 67,688.64 : x
  2. Step 2: Convert to fraction form
    138,816.54/208,240.92 = 67,688.64/x
  3. Step 3: Cross multiply
    138,816.54x = 208,240.92 × 67,688.64
  4. Step 4: Simplify right side
    138,816.54x = 14,095,544,667.15
  5. Step 5: Solve for x
    x = 14,095,544,667.15/138,816.54
  6. Step 6: Final answer
    x = 101,540.82

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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.