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Finding the Fourth Proportional to 61,211.70, 91,817.55 and 53,435.70

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Solution

The fourth proportional to 61,211.70, 91,817.55 and 53,435.70 is: 80,153.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,211.70 : 91,817.55 = 53,435.70 : x
  2. Step 2: Convert to fraction form
    61,211.70/91,817.55 = 53,435.70/x
  3. Step 3: Cross multiply
    61,211.70x = 91,817.55 × 53,435.70
  4. Step 4: Simplify right side
    61,211.70x = 4,906,335,056.54
  5. Step 5: Solve for x
    x = 4,906,335,056.54/61,211.70
  6. Step 6: Final answer
    x = 80,153.55

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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.