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Finding the Fourth Proportional to 97,064.82, 133,917.33 and 79,128.90

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Solution

The fourth proportional to 97,064.82, 133,917.33 and 79,128.90 is: 109,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,064.82 : 133,917.33 = 79,128.90 : x
  2. Step 2: Convert to fraction form
    97,064.82/133,917.33 = 79,128.90/x
  3. Step 3: Cross multiply
    97,064.82x = 133,917.33 × 79,128.90
  4. Step 4: Simplify right side
    97,064.82x = 10,596,731,013.84
  5. Step 5: Solve for x
    x = 10,596,731,013.84/97,064.82
  6. Step 6: Final answer
    x = 109,171.70

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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.