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Finding the Fourth Proportional to 91,809.03, 137,771.81 and 39,218.91

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Solution

The fourth proportional to 91,809.03, 137,771.81 and 39,218.91 is: 58,853.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,809.03 : 137,771.81 = 39,218.91 : x
  2. Step 2: Convert to fraction form
    91,809.03/137,771.81 = 39,218.91/x
  3. Step 3: Cross multiply
    91,809.03x = 137,771.81 × 39,218.91
  4. Step 4: Simplify right side
    91,809.03x = 5,403,260,020.83
  5. Step 5: Solve for x
    x = 5,403,260,020.83/91,809.03
  6. Step 6: Final answer
    x = 58,853.25

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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.