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Finding the Fourth Proportional to 103,692.28, 155,305.02 and 72,666.04

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Solution

The fourth proportional to 103,692.28, 155,305.02 and 72,666.04 is: 108,835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,692.28 : 155,305.02 = 72,666.04 : x
  2. Step 2: Convert to fraction form
    103,692.28/155,305.02 = 72,666.04/x
  3. Step 3: Cross multiply
    103,692.28x = 155,305.02 × 72,666.04
  4. Step 4: Simplify right side
    103,692.28x = 11,285,400,795.52
  5. Step 5: Solve for x
    x = 11,285,400,795.52/103,692.28
  6. Step 6: Final answer
    x = 108,835.50

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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.