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Finding the Fourth Proportional to 61,322.20, 91,983.30 and 45,575.80

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Solution

The fourth proportional to 61,322.20, 91,983.30 and 45,575.80 is: 68,363.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,322.20 : 91,983.30 = 45,575.80 : x
  2. Step 2: Convert to fraction form
    61,322.20/91,983.30 = 45,575.80/x
  3. Step 3: Cross multiply
    61,322.20x = 91,983.30 × 45,575.80
  4. Step 4: Simplify right side
    61,322.20x = 4,192,212,484.14
  5. Step 5: Solve for x
    x = 4,192,212,484.14/61,322.20
  6. Step 6: Final answer
    x = 68,363.70

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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.