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Finding the Fourth Proportional to 61,290.60, 91,934.07 and 16,920.06

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Solution

The fourth proportional to 61,290.60, 91,934.07 and 16,920.06 is: 25,379.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,290.60 : 91,934.07 = 16,920.06 : x
  2. Step 2: Convert to fraction form
    61,290.60/91,934.07 = 16,920.06/x
  3. Step 3: Cross multiply
    61,290.60x = 91,934.07 × 16,920.06
  4. Step 4: Simplify right side
    61,290.60x = 1,555,529,980.44
  5. Step 5: Solve for x
    x = 1,555,529,980.44/61,290.60
  6. Step 6: Final answer
    x = 25,379.58

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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.