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Finding the Fourth Proportional to 61,771.75, 85,254.17 and 39,112.85

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Solution

The fourth proportional to 61,771.75, 85,254.17 and 39,112.85 is: 53,981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,771.75 : 85,254.17 = 39,112.85 : x
  2. Step 2: Convert to fraction form
    61,771.75/85,254.17 = 39,112.85/x
  3. Step 3: Cross multiply
    61,771.75x = 85,254.17 × 39,112.85
  4. Step 4: Simplify right side
    61,771.75x = 3,334,533,563.08
  5. Step 5: Solve for x
    x = 3,334,533,563.08/61,771.75
  6. Step 6: Final answer
    x = 53,981.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.