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Finding the Fourth Proportional to 66,369.60, 99,554.40 and 21,997.80

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Solution

The fourth proportional to 66,369.60, 99,554.40 and 21,997.80 is: 32,996.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,369.60 : 99,554.40 = 21,997.80 : x
  2. Step 2: Convert to fraction form
    66,369.60/99,554.40 = 21,997.80/x
  3. Step 3: Cross multiply
    66,369.60x = 99,554.40 × 21,997.80
  4. Step 4: Simplify right side
    66,369.60x = 2,189,977,780.32
  5. Step 5: Solve for x
    x = 2,189,977,780.32/66,369.60
  6. Step 6: Final answer
    x = 32,996.70

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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.