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Finding the Fourth Proportional to 67,692.37, 93,440 and 39,398.06

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Solution

The fourth proportional to 67,692.37, 93,440 and 39,398.06 is: 54,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,692.37 : 93,440 = 39,398.06 : x
  2. Step 2: Convert to fraction form
    67,692.37/93,440 = 39,398.06/x
  3. Step 3: Cross multiply
    67,692.37x = 93,440 × 39,398.06
  4. Step 4: Simplify right side
    67,692.37x = 3,681,354,726.40
  5. Step 5: Solve for x
    x = 3,681,354,726.40/67,692.37
  6. Step 6: Final answer
    x = 54,383.60

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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.