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Finding the Fourth Proportional to 61,211.70, 91,720.35 and 51,297.30

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Solution

The fourth proportional to 61,211.70, 91,720.35 and 51,297.30 is: 76,864.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,211.70 : 91,720.35 = 51,297.30 : x
  2. Step 2: Convert to fraction form
    61,211.70/91,720.35 = 51,297.30/x
  3. Step 3: Cross multiply
    61,211.70x = 91,720.35 × 51,297.30
  4. Step 4: Simplify right side
    61,211.70x = 4,705,006,310.06
  5. Step 5: Solve for x
    x = 4,705,006,310.06/61,211.70
  6. Step 6: Final answer
    x = 76,864.49

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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.