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Finding the Fourth Proportional to 143,649.92, 215,402.79 and 83,697.77

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Solution

The fourth proportional to 143,649.92, 215,402.79 and 83,697.77 is: 125,504.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,649.92 : 215,402.79 = 83,697.77 : x
  2. Step 2: Convert to fraction form
    143,649.92/215,402.79 = 83,697.77/x
  3. Step 3: Cross multiply
    143,649.92x = 215,402.79 × 83,697.77
  4. Step 4: Simplify right side
    143,649.92x = 18,028,734,027.15
  5. Step 5: Solve for x
    x = 18,028,734,027.15/143,649.92
  6. Step 6: Final answer
    x = 125,504.66

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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.