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Finding the Fourth Proportional to 61,971.42, 85,520.64 and 35,115.75

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Solution

The fourth proportional to 61,971.42, 85,520.64 and 35,115.75 is: 48,459.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,971.42 : 85,520.64 = 35,115.75 : x
  2. Step 2: Convert to fraction form
    61,971.42/85,520.64 = 35,115.75/x
  3. Step 3: Cross multiply
    61,971.42x = 85,520.64 × 35,115.75
  4. Step 4: Simplify right side
    61,971.42x = 3,003,121,414.08
  5. Step 5: Solve for x
    x = 3,003,121,414.08/61,971.42
  6. Step 6: Final answer
    x = 48,459.78

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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.