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Finding the Fourth Proportional to 84,052.69, 125,938.91 and 69,105.91

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Solution

The fourth proportional to 84,052.69, 125,938.91 and 69,105.91 is: 103,543.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,052.69 : 125,938.91 = 69,105.91 : x
  2. Step 2: Convert to fraction form
    84,052.69/125,938.91 = 69,105.91/x
  3. Step 3: Cross multiply
    84,052.69x = 125,938.91 × 69,105.91
  4. Step 4: Simplify right side
    84,052.69x = 8,703,122,933.12
  5. Step 5: Solve for x
    x = 8,703,122,933.12/84,052.69
  6. Step 6: Final answer
    x = 103,543.66

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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.