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Finding the Fourth Proportional to 61,080.62, 91,616.58 and 18,959.69

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Solution

The fourth proportional to 61,080.62, 91,616.58 and 18,959.69 is: 28,438.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,080.62 : 91,616.58 = 18,959.69 : x
  2. Step 2: Convert to fraction form
    61,080.62/91,616.58 = 18,959.69/x
  3. Step 3: Cross multiply
    61,080.62x = 91,616.58 × 18,959.69
  4. Step 4: Simplify right side
    61,080.62x = 1,737,022,184.70
  5. Step 5: Solve for x
    x = 1,737,022,184.70/61,080.62
  6. Step 6: Final answer
    x = 28,438.19

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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.