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Finding the Fourth Proportional to 143,085.60, 214,725.60 and 79,905.60

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Solution

The fourth proportional to 143,085.60, 214,725.60 and 79,905.60 is: 119,912.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,085.60 : 214,725.60 = 79,905.60 : x
  2. Step 2: Convert to fraction form
    143,085.60/214,725.60 = 79,905.60/x
  3. Step 3: Cross multiply
    143,085.60x = 214,725.60 × 79,905.60
  4. Step 4: Simplify right side
    143,085.60x = 17,157,777,903.36
  5. Step 5: Solve for x
    x = 17,157,777,903.36/143,085.60
  6. Step 6: Final answer
    x = 119,912.68

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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.