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Finding the Fourth Proportional to 74,805.81, 103,270.16 and 57,771.81

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Solution

The fourth proportional to 74,805.81, 103,270.16 and 57,771.81 is: 79,754.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,805.81 : 103,270.16 = 57,771.81 : x
  2. Step 2: Convert to fraction form
    74,805.81/103,270.16 = 57,771.81/x
  3. Step 3: Cross multiply
    74,805.81x = 103,270.16 × 57,771.81
  4. Step 4: Simplify right side
    74,805.81x = 5,966,104,062.19
  5. Step 5: Solve for x
    x = 5,966,104,062.19/74,805.81
  6. Step 6: Final answer
    x = 79,754.55

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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.