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Finding the Fourth Proportional to 85,497.40, 128,015.70 and 61,996.60

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Solution

The fourth proportional to 85,497.40, 128,015.70 and 61,996.60 is: 92,827.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,497.40 : 128,015.70 = 61,996.60 : x
  2. Step 2: Convert to fraction form
    85,497.40/128,015.70 = 61,996.60/x
  3. Step 3: Cross multiply
    85,497.40x = 128,015.70 × 61,996.60
  4. Step 4: Simplify right side
    85,497.40x = 7,936,538,146.62
  5. Step 5: Solve for x
    x = 7,936,538,146.62/85,497.40
  6. Step 6: Final answer
    x = 92,827.83

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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.