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Finding the Fourth Proportional to 151,390.98, 208,919.76 and 82,480.11

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Solution

The fourth proportional to 151,390.98, 208,919.76 and 82,480.11 is: 113,822.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,390.98 : 208,919.76 = 82,480.11 : x
  2. Step 2: Convert to fraction form
    151,390.98/208,919.76 = 82,480.11/x
  3. Step 3: Cross multiply
    151,390.98x = 208,919.76 × 82,480.11
  4. Step 4: Simplify right side
    151,390.98x = 17,231,724,785.97
  5. Step 5: Solve for x
    x = 17,231,724,785.97/151,390.98
  6. Step 6: Final answer
    x = 113,822.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.