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Finding the Fourth Proportional to 43,145.80, 64,692.30 and 16,820.20

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Solution

The fourth proportional to 43,145.80, 64,692.30 and 16,820.20 is: 25,220.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,145.80 : 64,692.30 = 16,820.20 : x
  2. Step 2: Convert to fraction form
    43,145.80/64,692.30 = 16,820.20/x
  3. Step 3: Cross multiply
    43,145.80x = 64,692.30 × 16,820.20
  4. Step 4: Simplify right side
    43,145.80x = 1,088,137,424.46
  5. Step 5: Solve for x
    x = 1,088,137,424.46/43,145.80
  6. Step 6: Final answer
    x = 25,220.01

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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.