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Finding the Fourth Proportional to 66,390.80, 99,701.40 and 35,286.80

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Solution

The fourth proportional to 66,390.80, 99,701.40 and 35,286.80 is: 52,991.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,390.80 : 99,701.40 = 35,286.80 : x
  2. Step 2: Convert to fraction form
    66,390.80/99,701.40 = 35,286.80/x
  3. Step 3: Cross multiply
    66,390.80x = 99,701.40 × 35,286.80
  4. Step 4: Simplify right side
    66,390.80x = 3,518,143,361.52
  5. Step 5: Solve for x
    x = 3,518,143,361.52/66,390.80
  6. Step 6: Final answer
    x = 52,991.43

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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.