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Finding the Fourth Proportional to 66,910, 92,350.20 and 40,058.50

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Solution

The fourth proportional to 66,910, 92,350.20 and 40,058.50 is: 55,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,910 : 92,350.20 = 40,058.50 : x
  2. Step 2: Convert to fraction form
    66,910/92,350.20 = 40,058.50/x
  3. Step 3: Cross multiply
    66,910x = 92,350.20 × 40,058.50
  4. Step 4: Simplify right side
    66,910x = 3,699,410,486.70
  5. Step 5: Solve for x
    x = 3,699,410,486.70/66,910
  6. Step 6: Final answer
    x = 55,289.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.