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Finding the Fourth Proportional to 143,448.79, 215,027.88 and 72,156.01

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Solution

The fourth proportional to 143,448.79, 215,027.88 and 72,156.01 is: 108,160.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,448.79 : 215,027.88 = 72,156.01 : x
  2. Step 2: Convert to fraction form
    143,448.79/215,027.88 = 72,156.01/x
  3. Step 3: Cross multiply
    143,448.79x = 215,027.88 × 72,156.01
  4. Step 4: Simplify right side
    143,448.79x = 15,515,553,859.56
  5. Step 5: Solve for x
    x = 15,515,553,859.56/143,448.79
  6. Step 6: Final answer
    x = 108,160.93

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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.