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Finding the Fourth Proportional to 61,147.66, 91,734.72 and 21,166.60

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Solution

The fourth proportional to 61,147.66, 91,734.72 and 21,166.60 is: 31,754.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,147.66 : 91,734.72 = 21,166.60 : x
  2. Step 2: Convert to fraction form
    61,147.66/91,734.72 = 21,166.60/x
  3. Step 3: Cross multiply
    61,147.66x = 91,734.72 × 21,166.60
  4. Step 4: Simplify right side
    61,147.66x = 1,941,712,124.35
  5. Step 5: Solve for x
    x = 1,941,712,124.35/61,147.66
  6. Step 6: Final answer
    x = 31,754.48

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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.