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Finding the Fourth Proportional to 143,649.72, 215,474.64 and 68,752.24

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Solution

The fourth proportional to 143,649.72, 215,474.64 and 68,752.24 is: 103,128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,649.72 : 215,474.64 = 68,752.24 : x
  2. Step 2: Convert to fraction form
    143,649.72/215,474.64 = 68,752.24/x
  3. Step 3: Cross multiply
    143,649.72x = 215,474.64 × 68,752.24
  4. Step 4: Simplify right side
    143,649.72x = 14,814,364,163.19
  5. Step 5: Solve for x
    x = 14,814,364,163.19/143,649.72
  6. Step 6: Final answer
    x = 103,128.39

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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.