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Finding the Fourth Proportional to 61,291.81, 91,943.02 and 16,918.57

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Solution

The fourth proportional to 61,291.81, 91,943.02 and 16,918.57 is: 25,379.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,291.81 : 91,943.02 = 16,918.57 : x
  2. Step 2: Convert to fraction form
    61,291.81/91,943.02 = 16,918.57/x
  3. Step 3: Cross multiply
    61,291.81x = 91,943.02 × 16,918.57
  4. Step 4: Simplify right side
    61,291.81x = 1,555,544,460.79
  5. Step 5: Solve for x
    x = 1,555,544,460.79/61,291.81
  6. Step 6: Final answer
    x = 25,379.32

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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.