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Finding the Fourth Proportional to 91,821.33, 137,805.81 and 47,461.08

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Solution

The fourth proportional to 91,821.33, 137,805.81 and 47,461.08 is: 71,229.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821.33 : 137,805.81 = 47,461.08 : x
  2. Step 2: Convert to fraction form
    91,821.33/137,805.81 = 47,461.08/x
  3. Step 3: Cross multiply
    91,821.33x = 137,805.81 × 47,461.08
  4. Step 4: Simplify right side
    91,821.33x = 6,540,412,572.87
  5. Step 5: Solve for x
    x = 6,540,412,572.87/91,821.33
  6. Step 6: Final answer
    x = 71,229.77

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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.