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Finding the Fourth Proportional to 100,692.80, 151,060.80 and 30,579.20

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Solution

The fourth proportional to 100,692.80, 151,060.80 and 30,579.20 is: 45,875.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,692.80 : 151,060.80 = 30,579.20 : x
  2. Step 2: Convert to fraction form
    100,692.80/151,060.80 = 30,579.20/x
  3. Step 3: Cross multiply
    100,692.80x = 151,060.80 × 30,579.20
  4. Step 4: Simplify right side
    100,692.80x = 4,619,318,415.36
  5. Step 5: Solve for x
    x = 4,619,318,415.36/100,692.80
  6. Step 6: Final answer
    x = 45,875.36

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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.