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Finding the Fourth Proportional to 143,984.70, 215,977.05 and 80,999.10

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Solution

The fourth proportional to 143,984.70, 215,977.05 and 80,999.10 is: 121,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,984.70 : 215,977.05 = 80,999.10 : x
  2. Step 2: Convert to fraction form
    143,984.70/215,977.05 = 80,999.10/x
  3. Step 3: Cross multiply
    143,984.70x = 215,977.05 × 80,999.10
  4. Step 4: Simplify right side
    143,984.70x = 17,493,946,670.66
  5. Step 5: Solve for x
    x = 17,493,946,670.66/143,984.70
  6. Step 6: Final answer
    x = 121,498.65

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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.