Home / 66,103.15-99,144.45-21,729.61

Finding the Fourth Proportional to 66,103.15, 99,144.45 and 21,729.61

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Solution

The fourth proportional to 66,103.15, 99,144.45 and 21,729.61 is: 32,591.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,103.15 : 99,144.45 = 21,729.61 : x
  2. Step 2: Convert to fraction form
    66,103.15/99,144.45 = 21,729.61/x
  3. Step 3: Cross multiply
    66,103.15x = 99,144.45 × 21,729.61
  4. Step 4: Simplify right side
    66,103.15x = 2,154,370,232.16
  5. Step 5: Solve for x
    x = 2,154,370,232.16/66,103.15
  6. Step 6: Final answer
    x = 32,591.04

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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.