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Finding the Fourth Proportional to 81,323.60, 121,812.60 and 67,499.60

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Solution

The fourth proportional to 81,323.60, 121,812.60 and 67,499.60 is: 101,105.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.60 : 121,812.60 = 67,499.60 : x
  2. Step 2: Convert to fraction form
    81,323.60/121,812.60 = 67,499.60/x
  3. Step 3: Cross multiply
    81,323.60x = 121,812.60 × 67,499.60
  4. Step 4: Simplify right side
    81,323.60x = 8,222,301,774.96
  5. Step 5: Solve for x
    x = 8,222,301,774.96/81,323.60
  6. Step 6: Final answer
    x = 101,105.97

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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.