Home / 66,128.40-99,161.32-25,620.88

Finding the Fourth Proportional to 66,128.40, 99,161.32 and 25,620.88

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Solution

The fourth proportional to 66,128.40, 99,161.32 and 25,620.88 is: 38,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,128.40 : 99,161.32 = 25,620.88 : x
  2. Step 2: Convert to fraction form
    66,128.40/99,161.32 = 25,620.88/x
  3. Step 3: Cross multiply
    66,128.40x = 99,161.32 × 25,620.88
  4. Step 4: Simplify right side
    66,128.40x = 2,540,600,280.36
  5. Step 5: Solve for x
    x = 2,540,600,280.36/66,128.40
  6. Step 6: Final answer
    x = 38,419.20

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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.