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Finding the Fourth Proportional to 66,461.45, 99,704.79 and 21,494.90

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Solution

The fourth proportional to 66,461.45, 99,704.79 and 21,494.90 is: 32,246.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.45 : 99,704.79 = 21,494.90 : x
  2. Step 2: Convert to fraction form
    66,461.45/99,704.79 = 21,494.90/x
  3. Step 3: Cross multiply
    66,461.45x = 99,704.79 × 21,494.90
  4. Step 4: Simplify right side
    66,461.45x = 2,143,144,490.57
  5. Step 5: Solve for x
    x = 2,143,144,490.57/66,461.45
  6. Step 6: Final answer
    x = 32,246.43

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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.