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Finding the Fourth Proportional to 60,871.80, 91,316.34 and 18,755.30

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Solution

The fourth proportional to 60,871.80, 91,316.34 and 18,755.30 is: 28,135.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,871.80 : 91,316.34 = 18,755.30 : x
  2. Step 2: Convert to fraction form
    60,871.80/91,316.34 = 18,755.30/x
  3. Step 3: Cross multiply
    60,871.80x = 91,316.34 × 18,755.30
  4. Step 4: Simplify right side
    60,871.80x = 1,712,665,351.60
  5. Step 5: Solve for x
    x = 1,712,665,351.60/60,871.80
  6. Step 6: Final answer
    x = 28,135.61

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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.