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Finding the Fourth Proportional to 72,282.80, 108,424.20 and 19,692.20

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Solution

The fourth proportional to 72,282.80, 108,424.20 and 19,692.20 is: 29,538.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,282.80 : 108,424.20 = 19,692.20 : x
  2. Step 2: Convert to fraction form
    72,282.80/108,424.20 = 19,692.20/x
  3. Step 3: Cross multiply
    72,282.80x = 108,424.20 × 19,692.20
  4. Step 4: Simplify right side
    72,282.80x = 2,135,111,031.24
  5. Step 5: Solve for x
    x = 2,135,111,031.24/72,282.80
  6. Step 6: Final answer
    x = 29,538.30

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1.5x scale

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.