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Finding the Fourth Proportional to 80,173.36, 110,609.40 and 61,781.89

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Solution

The fourth proportional to 80,173.36, 110,609.40 and 61,781.89 is: 85,236.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,173.36 : 110,609.40 = 61,781.89 : x
  2. Step 2: Convert to fraction form
    80,173.36/110,609.40 = 61,781.89/x
  3. Step 3: Cross multiply
    80,173.36x = 110,609.40 × 61,781.89
  4. Step 4: Simplify right side
    80,173.36x = 6,833,657,783.77
  5. Step 5: Solve for x
    x = 6,833,657,783.77/80,173.36
  6. Step 6: Final answer
    x = 85,236.02

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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.