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Finding the Fourth Proportional to 100,961.15, 151,277.70 and 84,230.60

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Solution

The fourth proportional to 100,961.15, 151,277.70 and 84,230.60 is: 126,209.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,961.15 : 151,277.70 = 84,230.60 : x
  2. Step 2: Convert to fraction form
    100,961.15/151,277.70 = 84,230.60/x
  3. Step 3: Cross multiply
    100,961.15x = 151,277.70 × 84,230.60
  4. Step 4: Simplify right side
    100,961.15x = 12,742,211,437.62
  5. Step 5: Solve for x
    x = 12,742,211,437.62/100,961.15
  6. Step 6: Final answer
    x = 126,209.06

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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.