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Finding the Fourth Proportional to 143,635.51, 215,484.14 and 71,627.66

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Solution

The fourth proportional to 143,635.51, 215,484.14 and 71,627.66 is: 107,456.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,635.51 : 215,484.14 = 71,627.66 : x
  2. Step 2: Convert to fraction form
    143,635.51/215,484.14 = 71,627.66/x
  3. Step 3: Cross multiply
    143,635.51x = 215,484.14 × 71,627.66
  4. Step 4: Simplify right side
    143,635.51x = 15,434,624,715.31
  5. Step 5: Solve for x
    x = 15,434,624,715.31/143,635.51
  6. Step 6: Final answer
    x = 107,456.89

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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.