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Finding the Fourth Proportional to 61,138.89, 91,708.47 and 16,766.28

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Solution

The fourth proportional to 61,138.89, 91,708.47 and 16,766.28 is: 25,149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,138.89 : 91,708.47 = 16,766.28 : x
  2. Step 2: Convert to fraction form
    61,138.89/91,708.47 = 16,766.28/x
  3. Step 3: Cross multiply
    61,138.89x = 91,708.47 × 16,766.28
  4. Step 4: Simplify right side
    61,138.89x = 1,537,609,886.39
  5. Step 5: Solve for x
    x = 1,537,609,886.39/61,138.89
  6. Step 6: Final answer
    x = 25,149.46

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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.