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Finding the Fourth Proportional to 71,625.81, 107,438.61 and 19,035.30

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Solution

The fourth proportional to 71,625.81, 107,438.61 and 19,035.30 is: 28,552.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,625.81 : 107,438.61 = 19,035.30 : x
  2. Step 2: Convert to fraction form
    71,625.81/107,438.61 = 19,035.30/x
  3. Step 3: Cross multiply
    71,625.81x = 107,438.61 × 19,035.30
  4. Step 4: Simplify right side
    71,625.81x = 2,045,126,647.21
  5. Step 5: Solve for x
    x = 2,045,126,647.21/71,625.81
  6. Step 6: Final answer
    x = 28,552.93

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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.