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Finding the Fourth Proportional to 185,721.45, 278,692.84 and 67,402.01

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Solution

The fourth proportional to 185,721.45, 278,692.84 and 67,402.01 is: 101,143.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,721.45 : 278,692.84 = 67,402.01 : x
  2. Step 2: Convert to fraction form
    185,721.45/278,692.84 = 67,402.01/x
  3. Step 3: Cross multiply
    185,721.45x = 278,692.84 × 67,402.01
  4. Step 4: Simplify right side
    185,721.45x = 18,784,457,588.61
  5. Step 5: Solve for x
    x = 18,784,457,588.61/185,721.45
  6. Step 6: Final answer
    x = 101,143.18

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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.