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Finding the Fourth Proportional to 143,727.21, 215,703.81 and 99,664.02

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Solution

The fourth proportional to 143,727.21, 215,703.81 and 99,664.02 is: 149,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,727.21 : 215,703.81 = 99,664.02 : x
  2. Step 2: Convert to fraction form
    143,727.21/215,703.81 = 99,664.02/x
  3. Step 3: Cross multiply
    143,727.21x = 215,703.81 × 99,664.02
  4. Step 4: Simplify right side
    143,727.21x = 21,497,908,833.92
  5. Step 5: Solve for x
    x = 21,497,908,833.92/143,727.21
  6. Step 6: Final answer
    x = 149,574.38

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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.