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Finding the Fourth Proportional to 61,117.75, 91,689.62 and 18,996.82

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Solution

The fourth proportional to 61,117.75, 91,689.62 and 18,996.82 is: 28,499.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,117.75 : 91,689.62 = 18,996.82 : x
  2. Step 2: Convert to fraction form
    61,117.75/91,689.62 = 18,996.82/x
  3. Step 3: Cross multiply
    61,117.75x = 91,689.62 × 18,996.82
  4. Step 4: Simplify right side
    61,117.75x = 1,741,810,882.80
  5. Step 5: Solve for x
    x = 1,741,810,882.80/61,117.75
  6. Step 6: Final answer
    x = 28,499.27

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1.5x scale

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.