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Finding the Fourth Proportional to 66,221.20, 99,331.80 and 16,973.20

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Solution

The fourth proportional to 66,221.20, 99,331.80 and 16,973.20 is: 25,459.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.20 : 99,331.80 = 16,973.20 : x
  2. Step 2: Convert to fraction form
    66,221.20/99,331.80 = 16,973.20/x
  3. Step 3: Cross multiply
    66,221.20x = 99,331.80 × 16,973.20
  4. Step 4: Simplify right side
    66,221.20x = 1,685,978,507.76
  5. Step 5: Solve for x
    x = 1,685,978,507.76/66,221.20
  6. Step 6: Final answer
    x = 25,459.80

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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.